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diff --git a/modules/navigation/nav_region.h b/modules/navigation/nav_region.h
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+++ b/modules/navigation/nav_region.h
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+/*************************************************************************/
+/*  nav_region.h                                                         */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+#ifndef NAV_REGION_H
+#define NAV_REGION_H
+
+#include "scene/resources/navigation_mesh.h"
+
+#include "nav_rid.h"
+#include "nav_utils.h"
+#include <vector>
+
+/**
+	@author AndreaCatania
+*/
+
+class NavMap;
+class NavRegion;
+
+class NavRegion : public NavRid {
+	NavMap *map = nullptr;
+	Transform3D transform;
+	Ref<NavigationMesh> mesh;
+	uint32_t layers = 1;
+	Vector<gd::Edge::Connection> connections;
+
+	bool polygons_dirty = true;
+
+	/// Cache
+	std::vector<gd::Polygon> polygons;
+
+public:
+	NavRegion() {}
+
+	void scratch_polygons() {
+		polygons_dirty = true;
+	}
+
+	void set_map(NavMap *p_map);
+	NavMap *get_map() const {
+		return map;
+	}
+
+	void set_layers(uint32_t p_layers);
+	uint32_t get_layers() const;
+
+	void set_transform(Transform3D transform);
+	const Transform3D &get_transform() const {
+		return transform;
+	}
+
+	void set_mesh(Ref<NavigationMesh> p_mesh);
+	const Ref<NavigationMesh> get_mesh() const {
+		return mesh;
+	}
+
+	Vector<gd::Edge::Connection> &get_connections() {
+		return connections;
+	}
+	int get_connections_count() const;
+	Vector3 get_connection_pathway_start(int p_connection_id) const;
+	Vector3 get_connection_pathway_end(int p_connection_id) const;
+
+	std::vector<gd::Polygon> const &get_polygons() const {
+		return polygons;
+	}
+
+	bool sync();
+
+private:
+	void update_polygons();
+};
+
+#endif // NAV_REGION_H