With a history older than the state it’s in Crystal Lake Cave has been Iowa’s hidden treasure from the start. From gem mining where kids can discover their own fossils and gemstones in our specialized gem mining area to a gift shop full of great souvenirs and something for everyone, there’s always plenty to see when you visit us!

Spelunking, Mining, and More! With guided tours of well-lit passages of intricate formations through over three-quarters of a mile of cave tunnels there is a lot to explore and many fascinations to see. You are invited to visit and witness the ongoing miracle that created this natural masterpiece of the underground panorama.