Our Pick
Posted on @rawstates
Craters of the Moon
1924
Butte County, Idaho
BroMcjoe · CC BY-SA 4.0 · Wikimedia Commons
618 square miles of lava flows, cinder cones and caves from eruptions along a rift that last went off about 2,000 years ago and is expected to again. Apollo astronauts trained here in 1969 to learn volcanic geology before the Moon.
That was 1 of the hidden places.
Location: historic site
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