Hell's Gate offers climbing and hiking opportunities with two extinct volcanoes, the red cliffs of Hell's Gate Gorge, Obsidian Caves, and the pointed column of rock known as Fischer's Tower, a former volcanic plug. Geothermal features include hot springs and natural geysers hissing steam through vents in the earth's crust. The park also protects a wide variety of wildlife including leopards, baboons, hartebeest, eland, ostriches, gazelles, and more than 100 species of birds as well as eagle and vulture breeding grounds.