Description by the NPS: "The Fiery Furnace is a labyrinth of narrow sandstone canyons and fins. There are no marked trails and the area has suffered resource damage due to increased visitation. Hikers who want to explore the Fiery Furnace are encouraged to sign up for a ranger-guided hike. In order to visit the Furnace without a ranger, one must obtain a permit at the visitor center (fee charged) and watch a minimum impact video. Children under five are not permitted."