diff --git a/Sources/GeoJSON/GeoJSON+Codable.swift b/Sources/GeoJSON/GeoJSON+Codable.swift
index d35cb5a..f86627b 100644
--- a/Sources/GeoJSON/GeoJSON+Codable.swift
+++ b/Sources/GeoJSON/GeoJSON+Codable.swift
@@ -391,7 +391,7 @@ extension Feature {
 			))
 		}
 		
-		let geometry = try container.decodeIfPresent(AnyGeometry.self, forKey: .geometry)
+		let geometry = try container.decodeIfPresent(Geometry.self, forKey: .geometry)
 		let properties = try container.decode(Properties.self, forKey: .properties)
 		
 		self.init(geometry: geometry, properties: properties)
@@ -428,7 +428,10 @@ extension FeatureCollection {
 			))
 		}
 		
-		let features = try container.decodeIfPresent([Feature<Properties>].self, forKey: .features) ?? []
+		let features = try container.decodeIfPresent(
+			[Feature<Geometry, Properties>].self,
+			forKey: .features
+		) ?? []
 		
 		self.init(features: features)
 	}
diff --git a/Sources/GeoJSON/GeoJSON.docc/Documentation.md b/Sources/GeoJSON/GeoJSON.docc/Documentation.md
index 6030082..769ce58 100644
--- a/Sources/GeoJSON/GeoJSON.docc/Documentation.md
+++ b/Sources/GeoJSON/GeoJSON.docc/Documentation.md
@@ -15,9 +15,12 @@
 ### Objects
 
 - ``Object``
+- ``CodableObject``
 - <doc:Geometries>
 - ``Feature``
+- ``AnyFeature``
 - ``FeatureCollection``
+- ``AnyFeatureCollection``
 
 ### Bounding Boxes
 
diff --git a/Sources/GeoJSON/GeoJSON.docc/Geometries.md b/Sources/GeoJSON/GeoJSON.docc/Geometries.md
index 0b96368..ec387f0 100644
--- a/Sources/GeoJSON/GeoJSON.docc/Geometries.md
+++ b/Sources/GeoJSON/GeoJSON.docc/Geometries.md
@@ -5,6 +5,7 @@
 ### Base
 
 - ``Geometry``
+- ``CodableGeometry``
 - ``AnyGeometry``
 
 ### Introduced concepts
diff --git a/Sources/GeoJSON/Geometries/GeometryCollection.swift b/Sources/GeoJSON/Geometries/GeometryCollection.swift
index 60b90d0..5b3070a 100644
--- a/Sources/GeoJSON/Geometries/GeometryCollection.swift
+++ b/Sources/GeoJSON/Geometries/GeometryCollection.swift
@@ -7,7 +7,7 @@
 //
 
 /// A [GeoJSON GeometryCollection](https://datatracker.ietf.org/doc/html/rfc7946#section-3.1.8).
-public struct GeometryCollection: Geometry {
+public struct GeometryCollection: CodableGeometry {
 	
 	public static var geometryType: GeoJSON.`Type`.Geometry { .geometryCollection }
 	
diff --git a/Sources/GeoJSON/Geometries/LineString.swift b/Sources/GeoJSON/Geometries/LineString.swift
index dd42337..1659814 100644
--- a/Sources/GeoJSON/Geometries/LineString.swift
+++ b/Sources/GeoJSON/Geometries/LineString.swift
@@ -16,13 +16,17 @@ public protocol LineString: SingleGeometry {
 	
 }
 
+extension LineString {
+	
+	public static var geometryType: GeoJSON.`Type`.Geometry { .lineString }
+	
+}
+
 /// A ``LineString`` with ``Point2D``s.
 public struct LineString2D: LineString {
 	
 	public typealias Position = Position2D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .lineString }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .lineString2D(self) }
@@ -46,8 +50,6 @@ public struct LineString3D: LineString {
 	
 	public typealias Position = Position3D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .lineString }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .lineString3D(self) }
diff --git a/Sources/GeoJSON/Geometries/MultiLineString.swift b/Sources/GeoJSON/Geometries/MultiLineString.swift
index 08469cf..1eb6f8c 100644
--- a/Sources/GeoJSON/Geometries/MultiLineString.swift
+++ b/Sources/GeoJSON/Geometries/MultiLineString.swift
@@ -16,13 +16,17 @@ public protocol MultiLineString: SingleGeometry {
 	
 }
 
+extension MultiLineString {
+	
+	public static var geometryType: GeoJSON.`Type`.Geometry { .multiLineString }
+	
+}
+
 /// A ``MultiLineString`` with ``Point2D``s.
 public struct MultiLineString2D: MultiLineString {
 	
 	public typealias LineString = LineString2D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .multiLineString }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .multiLineString2D(self) }
@@ -52,8 +56,6 @@ public struct MultiLineString3D: MultiLineString {
 	
 	public typealias LineString = LineString3D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .multiLineString }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .multiLineString3D(self) }
diff --git a/Sources/GeoJSON/Geometries/MultiPoint.swift b/Sources/GeoJSON/Geometries/MultiPoint.swift
index 5a1746d..381c87c 100644
--- a/Sources/GeoJSON/Geometries/MultiPoint.swift
+++ b/Sources/GeoJSON/Geometries/MultiPoint.swift
@@ -14,13 +14,17 @@ public protocol MultiPoint: SingleGeometry {
 	
 }
 
+extension MultiPoint {
+	
+	public static var geometryType: GeoJSON.`Type`.Geometry { .multiPoint }
+	
+}
+
 /// A ``MultiPoint`` with ``Point2D``s.
 public struct MultiPoint2D: MultiPoint {
 	
 	public typealias Point = Point2D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .multiPoint }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .multiPoint2D(self) }
@@ -36,8 +40,6 @@ public struct MultiPoint3D: MultiPoint {
 	
 	public typealias Point = Point3D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .multiPoint }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .multiPoint3D(self) }
diff --git a/Sources/GeoJSON/Geometries/MultiPolygon.swift b/Sources/GeoJSON/Geometries/MultiPolygon.swift
index ac01a21..bb477d2 100644
--- a/Sources/GeoJSON/Geometries/MultiPolygon.swift
+++ b/Sources/GeoJSON/Geometries/MultiPolygon.swift
@@ -14,13 +14,17 @@ public protocol MultiPolygon: SingleGeometry {
 	
 }
 
+extension MultiPolygon {
+	
+	public static var geometryType: GeoJSON.`Type`.Geometry { .multiPolygon }
+	
+}
+
 /// A ``MultiPolygon`` with ``Point2D``s.
 public struct MultiPolygon2D: MultiPolygon {
 	
 	public typealias Polygon = Polygon2D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .multiPolygon }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .multiPolygon2D(self) }
@@ -36,8 +40,6 @@ public struct MultiPolygon3D: MultiPolygon {
 	
 	public typealias Polygon = Polygon3D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .multiPolygon }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .multiPolygon3D(self) }
diff --git a/Sources/GeoJSON/Geometries/Point.swift b/Sources/GeoJSON/Geometries/Point.swift
index 228f361..968d013 100644
--- a/Sources/GeoJSON/Geometries/Point.swift
+++ b/Sources/GeoJSON/Geometries/Point.swift
@@ -14,13 +14,17 @@ public protocol Point: SingleGeometry {
 	
 }
 
+extension Point {
+	
+	public static var geometryType: GeoJSON.`Type`.Geometry { .point }
+	
+}
+
 /// A two-dimensional ``Point`` (with longitude and latitude).
 public struct Point2D: Point {
 	
 	public typealias Position = Position2D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .point }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .point2D(self) }
@@ -36,8 +40,6 @@ public struct Point3D: Point {
 	
 	public typealias Position = Position3D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .point }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .point3D(self) }
diff --git a/Sources/GeoJSON/Geometries/Polygon.swift b/Sources/GeoJSON/Geometries/Polygon.swift
index bee3fae..d74dd81 100644
--- a/Sources/GeoJSON/Geometries/Polygon.swift
+++ b/Sources/GeoJSON/Geometries/Polygon.swift
@@ -17,6 +17,12 @@ public protocol Polygon: SingleGeometry {
 	
 }
 
+extension Polygon {
+	
+	public static var geometryType: GeoJSON.`Type`.Geometry { .polygon }
+	
+}
+
 public struct LinearRingCoordinates<Point: GeoJSON.Point>: Boundable, Hashable, Codable {
 	
 	public typealias RawValue = NonEmpty<NonEmpty<NonEmpty<NonEmpty<[Point.Coordinates]>>>>
@@ -61,8 +67,6 @@ public struct Polygon2D: Polygon {
 	
 	public typealias Point = Point2D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .polygon }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .polygon2D(self) }
@@ -78,8 +82,6 @@ public struct Polygon3D: Polygon {
 	
 	public typealias Point = Point3D
 	
-	public static var geometryType: GeoJSON.`Type`.Geometry { .polygon }
-	
 	public var coordinates: Coordinates
 	
 	public var asAnyGeometry: AnyGeometry { .polygon3D(self) }
diff --git a/Sources/GeoJSON/Objects/Feature.swift b/Sources/GeoJSON/Objects/Feature.swift
index df1b5fa..47464b3 100644
--- a/Sources/GeoJSON/Objects/Feature.swift
+++ b/Sources/GeoJSON/Objects/Feature.swift
@@ -8,21 +8,23 @@
 
 /// A [GeoJSON Feature](https://datatracker.ietf.org/doc/html/rfc7946#section-3.2).
 public struct Feature<
-//	Geometry: GeoJSON.Geometry,
-//	BoundingBox: GeoJSON.BoundingBox,
+	Geometry: GeoJSON.Geometry & Codable,
 	Properties: GeoJSON.FeatureProperties
->: GeoJSON.Object {
+>: CodableObject {
 	
 	public static var geoJSONType: GeoJSON.`Type` { .feature }
 	
-	public var bbox: AnyBoundingBox? { geometry?.bbox }
+	public var bbox: Geometry.BoundingBox? { geometry?.bbox }
 	
-	public var geometry: AnyGeometry?
+	public var geometry: Geometry?
 	public var properties: Properties
 	
-	public init(geometry: AnyGeometry?, properties: Properties) {
+	public init(geometry: Geometry?, properties: Properties) {
 		self.geometry = geometry
 		self.properties = properties
 	}
 	
 }
+
+/// A (half) type-erased ``Feature``.
+public typealias AnyFeature<Properties: GeoJSON.FeatureProperties> = Feature<AnyGeometry, Properties>
diff --git a/Sources/GeoJSON/Objects/FeatureCollection.swift b/Sources/GeoJSON/Objects/FeatureCollection.swift
index 28f4818..51fba32 100644
--- a/Sources/GeoJSON/Objects/FeatureCollection.swift
+++ b/Sources/GeoJSON/Objects/FeatureCollection.swift
@@ -8,15 +8,20 @@
 
 /// A [GeoJSON FeatureCollection](https://datatracker.ietf.org/doc/html/rfc7946#section-3.3).
 public struct FeatureCollection<
-//	BoundingBox: GeoJSON.BoundingBox,
+	Geometry: GeoJSON.Geometry & Codable,
 	Properties: GeoJSON.FeatureProperties
->: GeoJSON.Object {
+>: CodableObject {
 	
 	public static var geoJSONType: GeoJSON.`Type` { .featureCollection }
 	
-	public var features: [Feature<Properties>]
+	public var features: [Feature<Geometry, Properties>]
 	
 	// FIXME: Fix bounding box
 	public var bbox: AnyBoundingBox? { nil }
 	
 }
+
+/// A (half) type-erased ``FeatureCollection``.
+public typealias AnyFeatureCollection<
+	Properties: GeoJSON.FeatureProperties
+> = FeatureCollection<AnyGeometry, Properties>
diff --git a/Sources/GeoJSON/Objects/Geometry.swift b/Sources/GeoJSON/Objects/Geometry.swift
index 6344c2b..29be8a9 100644
--- a/Sources/GeoJSON/Objects/Geometry.swift
+++ b/Sources/GeoJSON/Objects/Geometry.swift
@@ -11,9 +11,6 @@ import Turf
 /// A [GeoJSON Geometry](https://datatracker.ietf.org/doc/html/rfc7946#section-3.1).
 public protocol Geometry: GeoJSON.Object {
 	
-	/// The GeoJSON type of this geometry.
-	static var geometryType: GeoJSON.`Type`.Geometry { get }
-	
 	var bbox: BoundingBox? { get }
 	
 	/// This geometry, but type-erased.
@@ -21,7 +18,14 @@ public protocol Geometry: GeoJSON.Object {
 	
 }
 
-extension Geometry {
+public protocol CodableGeometry: Geometry, CodableObject {
+	
+	/// The GeoJSON type of this geometry.
+	static var geometryType: GeoJSON.`Type`.Geometry { get }
+	
+}
+
+extension CodableGeometry {
 	
 	public static var geoJSONType: GeoJSON.`Type` { .geometry(Self.geometryType) }
 	
@@ -29,7 +33,7 @@ extension Geometry {
 
 /// A single [GeoJSON Geometry](https://datatracker.ietf.org/doc/html/rfc7946#section-3.1)
 /// (not a [GeometryCollection](https://datatracker.ietf.org/doc/html/rfc7946#section-3.1.8)).
-public protocol SingleGeometry: Geometry {
+public protocol SingleGeometry: CodableGeometry {
 	
 	associatedtype Coordinates: Boundable & Hashable & Codable
 	associatedtype BoundingBox = Coordinates.BoundingBox
@@ -47,7 +51,7 @@ extension SingleGeometry {
 }
 
 /// A type-erased ``Geometry``.
-public enum AnyGeometry: Hashable, Codable {
+public enum AnyGeometry: Geometry, Hashable, Codable {
 	
 	case geometryCollection(GeometryCollection)
 	
@@ -65,37 +69,46 @@ public enum AnyGeometry: Hashable, Codable {
 	case polygon3D(Polygon3D)
 	case multiPolygon3D(MultiPolygon3D)
 	
+//	public var geometryType: GeoJSON.`Type`.Geometry {
+//		switch self {
+//		case .geometryCollection(let geo): 	return geo.geometryType
+//
+//		case .point2D(let geo): 			return geo.geometryType
+//		case .multiPoint2D(let geo): 		return geo.geometryType
+//		case .lineString2D(let geo): 		return geo.geometryType
+//		case .multiLineString2D(let geo): 	return geo.geometryType
+//		case .polygon2D(let geo): 			return geo.geometryType
+//		case .multiPolygon2D(let geo): 		return geo.geometryType
+//
+//		case .point3D(let geo): 			return geo.geometryType
+//		case .multiPoint3D(let geo): 		return geo.geometryType
+//		case .lineString3D(let geo): 		return geo.geometryType
+//		case .multiLineString3D(let geo): 	return geo.geometryType
+//		case .polygon3D(let geo): 			return geo.geometryType
+//		case .multiPolygon3D(let geo): 		return geo.geometryType
+//		}
+//	}
+	
 	public var bbox: AnyBoundingBox? {
 		switch self {
-		case .geometryCollection(let geometryCollection):
-			return geometryCollection.bbox
+		case .geometryCollection(let geo): 	return geo.bbox
 			
-		case .point2D(let point2D):
-			return point2D.bbox?.asAny
-		case .multiPoint2D(let multiPoint2D):
-			return multiPoint2D.bbox?.asAny
-		case .lineString2D(let lineString2D):
-			return lineString2D.bbox?.asAny
-		case .multiLineString2D(let multiLineString2D):
-			return multiLineString2D.bbox?.asAny
-		case .polygon2D(let polygon2D):
-			return polygon2D.bbox?.asAny
-		case .multiPolygon2D(let multiPolygon2D):
-			return multiPolygon2D.bbox?.asAny
+		case .point2D(let geo): 			return geo.bbox?.asAny
+		case .multiPoint2D(let geo): 		return geo.bbox?.asAny
+		case .lineString2D(let geo): 		return geo.bbox?.asAny
+		case .multiLineString2D(let geo): 	return geo.bbox?.asAny
+		case .polygon2D(let geo): 			return geo.bbox?.asAny
+		case .multiPolygon2D(let geo): 		return geo.bbox?.asAny
 			
-		case .point3D(let point3D):
-			return point3D.bbox?.asAny
-		case .multiPoint3D(let multiPoint3D):
-			return multiPoint3D.bbox?.asAny
-		case .lineString3D(let lineString3D):
-			return lineString3D.bbox?.asAny
-		case .multiLineString3D(let multiLineString3D):
-			return multiLineString3D.bbox?.asAny
-		case .polygon3D(let polygon3D):
-			return polygon3D.bbox?.asAny
-		case .multiPolygon3D(let multiPolygon3D):
-			return multiPolygon3D.bbox?.asAny
+		case .point3D(let geo): 			return geo.bbox?.asAny
+		case .multiPoint3D(let geo): 		return geo.bbox?.asAny
+		case .lineString3D(let geo): 		return geo.bbox?.asAny
+		case .multiLineString3D(let geo): 	return geo.bbox?.asAny
+		case .polygon3D(let geo): 			return geo.bbox?.asAny
+		case .multiPolygon3D(let geo): 		return geo.bbox?.asAny
 		}
 	}
 	
+	public var asAnyGeometry: AnyGeometry { self }
+	
 }
diff --git a/Sources/GeoJSON/Objects/Object.swift b/Sources/GeoJSON/Objects/Object.swift
index 61406e4..7ff4878 100644
--- a/Sources/GeoJSON/Objects/Object.swift
+++ b/Sources/GeoJSON/Objects/Object.swift
@@ -7,14 +7,18 @@
 //
 
 /// A [GeoJSON Object](https://datatracker.ietf.org/doc/html/rfc7946#section-3).
-public protocol Object: Hashable, Codable {
+public protocol Object: Hashable {
 	
 	associatedtype BoundingBox: GeoJSON.BoundingBox
 	
+	var bbox: BoundingBox? { get }
+	
+}
+
+public protocol CodableObject: GeoJSON.Object, Codable {
+	
 	/// The [GeoJSON type](https://datatracker.ietf.org/doc/html/rfc7946#section-1.4) of this
 	/// [GeoJSON object](https://datatracker.ietf.org/doc/html/rfc7946#section-3).
 	static var geoJSONType: GeoJSON.`Type` { get }
 	
-	var bbox: BoundingBox? { get }
-	
 }
diff --git a/Tests/GeoJSONTests/GeoJSON+DecodableTests.swift b/Tests/GeoJSONTests/GeoJSON+DecodableTests.swift
index 0800c02..a13a368 100644
--- a/Tests/GeoJSONTests/GeoJSON+DecodableTests.swift
+++ b/Tests/GeoJSONTests/GeoJSON+DecodableTests.swift
@@ -170,10 +170,10 @@ final class GeoJSONDecodableTests: XCTestCase {
 		].joined()
 		
 		let data: Data = try XCTUnwrap(string.data(using: .utf8))
-		let feature = try JSONDecoder().decode(Feature<FeatureProperties>.self, from: data)
+		let feature = try JSONDecoder().decode(Feature<Point2D, FeatureProperties>.self, from: data)
 		
 		let expected: Feature = Feature(
-			geometry: .point2D(Point2D(coordinates: .nantes)),
+			geometry: Point2D(coordinates: .nantes),
 			properties: FeatureProperties()
 		)
 		XCTAssertEqual(feature, expected)
@@ -200,9 +200,9 @@ final class GeoJSONDecodableTests: XCTestCase {
 		"""
 		
 		let data: Data = try XCTUnwrap(string.data(using: .utf8))
-		let feature = try JSONDecoder().decode(Feature<RealWorldProperties>.self, from: data)
+		let feature = try JSONDecoder().decode(AnyFeature<RealWorldProperties>.self, from: data)
 		
-		let expected: Feature = Feature(
+		let expected: AnyFeature = AnyFeature(
 			geometry: .point2D(Point2D(coordinates: .init(latitude: 0.5, longitude: 102))),
 			properties: RealWorldProperties(prop0: "value0")
 		)
@@ -337,9 +337,9 @@ final class GeoJSONDecodableTests: XCTestCase {
 		"""
 		
 		let data: Data = try XCTUnwrap(string.data(using: .utf8))
-		let feature = try JSONDecoder().decode(FeatureCollection<HeterogeneousProperties>.self, from: data)
+		let feature = try JSONDecoder().decode(AnyFeatureCollection<HeterogeneousProperties>.self, from: data)
 		
-		let expected: FeatureCollection<HeterogeneousProperties> = FeatureCollection(features: [
+		let expected: AnyFeatureCollection<HeterogeneousProperties> = AnyFeatureCollection(features: [
 			Feature(
 				geometry: .point2D(Point2D(coordinates: .init(latitude: 0.5, longitude: 102))),
 				properties: .type1(.init(prop0: "value0"))
diff --git a/Tests/GeoJSONTests/GeoJSON+EncodableTests.swift b/Tests/GeoJSONTests/GeoJSON+EncodableTests.swift
index 7369974..3f9b7d4 100644
--- a/Tests/GeoJSONTests/GeoJSON+EncodableTests.swift
+++ b/Tests/GeoJSONTests/GeoJSON+EncodableTests.swift
@@ -142,7 +142,7 @@ final class GeoJSONEncodableTests: XCTestCase {
 		struct FeatureProperties: Hashable, Codable {}
 		
 		let feature: Feature = Feature(
-			geometry: .point2D(Point2D(coordinates: .nantes)),
+			geometry: Point2D(coordinates: .nantes),
 			properties: FeatureProperties()
 		)
 		let data: Data = try JSONEncoder().encode(feature)