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The Indiana Cave Trail Passport program ended 12/31/22.
Incomplete passports are no longer valid.

Four Caves

All Unique

Photo of Bluespring Caverns

Bluespring Caverns

Tour guides pilot custom tour boats along the course of a subterranean river for over a mile.

Photo of Marengo Cave

Marengo Cave

Two easy walking tours, cave exploration trips, gemstone mining, and cave simulator.

Photo of Indiana Caverns

Indiana Caverns

Indiana's newest show cave, in Indiana's longest cave! Enjoy a walking tour, boat ride, and more.

Photo of Squire Boone Caverns

Squire Boone Caverns

See waterfalls and formations while exploring a living and growing ecosystem.

How the Passport Works

Three Easy Steps

Get Passport

Get Stamps

Get Shirt

Common Questions