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19821 Shepherdstown Pike. Boonsboro, MD
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Crystal Grottoes Caverns
Touring season has officially begun.
We are now open every day of the week (April 18th forward), from 10am-5pm.
Tours start on every hour and half hour, and last around 30-45 minutes.

Crystal Grottoes Caverns

Come Experience Maryland's Premier Caverns Today! 

Maryland’s Only Show Cave – A Hidden Underground Wonderland​

Discover the awe-inspiring beauty of Crystal Grottoes Caverns, nestled in the heart of Boonsboro, Maryland. As the state's only commercialized cave, we offer a unique subterranean adventure filled with stunning natural formations and rich history.​

Explore Nature's Masterpiece
Formed over thousands of years, our caverns boast more formations per square foot than any other known cave. Marvel at the intricate stalactites, stalagmites, columns, and delicate draperies that adorn the chambers. Each tour, lasting approximately 40 minutes, is guided by knowledgeable staff who share insights into the geological and historical significance of the caverns.


Tour Details

Additional Attractions
Enhance your visit with our Gem Mill experience, where guests can sift through sand to uncover gemstones, fossils, and other treasures.

Plan Your Visit

Experience the magic of Crystal Grottoes Caverns—a journey beneath the surface to a world of natural wonder.​