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Incredible Underground Attractions In The US

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Greenbrier Bunker, West Virginia

Under the West Virginia part of Greenbrier resort lies the secret Greenbrier bunker, built in the '60s to protect the US Senate during nuclear war. It can hold 1,100 people, with bunk beds, showers

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City Market Catacombs, Indiana

Explore the quiet catacombs under City Market in Indy. Originally Tomlinson Hall's basement, now closed for tours due to construction.

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Onondaga Cave, Missouri

Explore Onondaga Cave in Onondaga Cave State Park for stunning stalactites and stalagmites. Don't forget a jacket—it's chilly year-round!

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Dinosaur Caves, California

The California coast in San Luis Obispo County has cool caves, arches, and rocks. You can kayak in the caves, some are 30 feet deep! Look out for seals, otters, and dolphins.

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Old Sacramento Underground, California

In 1861, big storms flooded Sacramento for 45 days. People raised the streets and houses by 9 feet over 15 years to avoid leaving.  the Sacramento History Museum gives tours of the old basements

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Inner Space Cavern, Texas

In 1963, the Texas Highway Department found Inner Space Cavern while testing rock for a bridge. A drill broke through the cave's roof, revealing a cool underground world with pointy rocks

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Indiana Caverns, Indiana

Explore Indiana Caverns, the state's longest cave since 2013. Take cave tours and kayak on an underground river. Keep an eye out for cave crayfish!