Lehman Caves – Located in the Great Basin National Park, Nevada, USA. Gentle rare limestone creations make the Lehman Caves one of the most wonderful underground chambers on the globe. The Cave is a fine-looking marble cave ornately decorated with stalactites, stalagmites, helictites, flowstone, popcorn, and over 300 rare shield creations. The cave was discovered in 1885 by Absalom Lehman. It might only be entered with a guided tour. Cave tours are obtainable daily, year round. Park rangers tip all tours, enlightening the history, ecology, and geology of the caves. The elevation at the cave entry is 6,825ft (2080m). The temperature in the cave is a constant 50° F (10° C) year round.