Underground Adventures

Venture into Underground Indiana to discover the wonderful world of caves and caverns.
The Indiana Cave Trail is the best way to experience all four caves in southern Indiana — Bluespring Caverns, Marengo Cave, Squire Boone Caverns and Indiana Caverns.

Pick up a passport at any one of the caves, Or Print it out Here. Visit all four sites and have each location validate your passport when you purchase your cave tour tickets. Present your completed passport at the fourth cave and receive your special Indiana Cave Trail t-shirt.

Each cave offers something unique. Plan a fun family weekend to explore all four. See our Local Attractions page for a list of overnight accommodations in the area.

* You must have Adobe Acrobat Reader to view the passport.
To download a free copy of Acrobat Reader, click here.

Bluespring Caverns
Marengo Caves
Squire Boone Caverns
Indiana Caverns