The special locations to view include: Fischer's Tower, formerly a volcano's plug, the Central Tower and Njorowa Gorges. Two extinct volcanoes: Olkaria and Hobley's are worth a trip. Natural steam vents rise from fissures in the volcanic rock. Obsidian, a striking black glassy rock formed from cooled molten lava is a feature of this landscape. Game to view includes: Buffaloes, Masai Giraffes, Elands, Coke's Hartebeests, Lions, Leopards and some Cheetahs. A haven for ornithologists and rock climbers, the cliffs of Hell's Gate are breeding grounds for Vultures, Verreaux's Eagles, Augur Buzzard and thousands of swifts; 103 species of birds have been recorded in the Park.