Located 16 miles north of Shoshone on US Hwy. 93. This natural wonder is actually a lava tube that is 1,000 ft. long and varies between 8 and 30 ft. in height. Take a tour and explore the trails, but be sure to dress warmly, even during the summer months.

Their constant 50° temperatures do make a pleasant contrast to the often scorching summer heat—the "ice" in the name is caused by air currents flowing through the tubes, which causes subterranean water to freeze.

These caves are one of the natural wonders of the world. Trained guides explain the geologic, volcanic, and historical background in these large lava ice caves. A museum contains Indian artifacts, gems, and minerals of local and world interest.

The only town along this stretch of road, Shoshone is a ranching and railroad center that marks the junction of Hwy-75 with US-93. Some of its buildings have been constructed from local volcanic rock, and though it’s a fairly timeworn place, Shoshone looks great at sunset, when its steel water tower glows and places like the neon-signed Manhattan Cafe along the railroad tracks look especially appealing.