Craters of the Moon National Monument

We did an overnight at CMNM which is in Eastern Idaho about 20 miles west of Arco. This is a 752,000 acre monument and wilderness area. This massive tract was once an area of significant volcanic activity and features huge lava fields, spatter cones and the remnants of a number of smaller volcanoes. This monument is so otherworldly that NASA sends astronauts to train here for Moon and Mars walks. We also did some caving in several lava tube caves which were formed by underground molten lava flows. 0058,0059


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