The Fiery Furnace is a natural labyrinth of narrow passages between towering sandstone walls. To enter the Fiery Furnace, visitors must accompany a ranger-guided tour or obtain a hiking permit at the visitor center. There are no trails, signs, or cairns in the Fiery Furnace. GPS units do not work well due to the towering sandstone walls. Navigating its complex passages requires physical agility and careful observation. To protect the wildlife and plants that inhabit sand dunes and drainages between the rock walls, visitors must choose their steps wisely.