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Travel the Trail
Score a Free T-Shirt!

Four Caves

One Amazing Trail

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

Pick up your passport at any of the 4 caves.

Get Stamps

As you visit, each cave stamps your passport.

Get Shirt

At last cave, you swap passport for t-shirt.

Common Questions

  •    Can my group do this?

    Families & Individuals Only
    The cave trail is for families and individuals, those NOT receiving group rates.
  •    Does the offer expire?

    By 12/31/2020
    You have through December of the current year to finish visiting all four show caves and earn your free shirt.
  •    Can I see all 4 in one day?

    No Way
    It would be impossible to tour all four caves in one day. Why rush? Take the weekend or a full year. It's easy to see two caves in one day and have a great get-a-way in Southern Indiana.
  •    Where do I get my passport?

    At Any Cave
    The first cave you visit will provide your passport. There is 1 spot for each cave. Each person needs their own passport.