Photo of family walking in the cave.

What is a Membership?

Help support the conservation of Cave of the Mounds National Natural Landmark by becoming a Keys to the Cave member. Membership is good for 1 year from the date of your first Cave visit. You can purchase membership for multiple members at once. All proceeds of memberships go towards protecting this geologic treasure. You can purchase your Annual Memberships in person the day of your visit.

Membership Benefits include: Keys to the Cave card, granting you unlimited Cave Tour admissions at Cave of the Mounds for 1 year.

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Upgrade your ticket today and get UNLIMITED cave visits for a whole year!

Only $5.99!*

*When purchased with a regular priced ticket