The Atlas Obscura Guide To

Hidden
Arco

Discover 3 Cool and Unusual Things to Do in Arco, Idaho

Unusual
Attractions
in Arco

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Kings Bowl and Great Rift from air. King's Bowl is a phreatic explosion pit 280 feet (90 m) long, 100 feet (30 m) wide, and 100 feet (30 m) deep, caused by lava meeting groundwater and producing a steam explosion 2,200 years ago. (Wikimedia Commons)

Craters of the Moon National Monument and Preserve

Home to the deepest rift anywhere on Earth.

43.4167, -113.5167

Added by sideshowilly

EBR-I internal

Experimental Breeder Reactor-I

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

43.5115, -113.0087

Added by kondorqueen

Devil Boat in a town of Arco

The Devil Boat

Supposedly Satanic numbers adorn this preserved submarine sail.

43.6342, -113.2971

Added by friedtc

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gomezmama wants to go to Craters of the Moon National Monument and Preserve

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