The Kuželj Wall Forest Reserve covers the edge of the precipitous lookout wall in the canyon of the Kolpa River. A special feature of the wall is the Kuželjsko window, a natural window covered by a beautiful natural bridge. The Kočevska mountain transversal and the Kostel mountain trail lead past this window. The 874-meter-high wall is a geomorphologic natural heritage with habitats for rare, endangered and protected plant and animal species.