• Explore and Discover One of the Last Frontiers in the World ...

    Jewel Cave

    National Monument South Dakota

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  • Caution - Roadwork on Highway 16 - Expect Delays

    Construction projects both along highway 16 and the Jewel Cave parking lot are planned during this spring season. The visitor center will be open Monday - Friday, 8:30 a.m. – 4:30 p.m., and closed on weekends through April. No reservations for cave tours. More »

Explore and Discover One of the Last Frontiers in the World ...

Immerse yourself within the third longest cave in the world. With over 169 miles of mapped and surveyed passages, this underground wilderness appeals to human curiosity. Its splendor is revealed through fragile formations and glimpses of brilliant color. Its maze of passages lure explorers, and its scientific wealth remains a mystery. This resource is truly a jewel in the National Park Service.

Did You Know?

Calcite Spar Crystal/NPS file photo

The “jewels” of Jewel Cave are calcite spar crystals. Calcite, which is about as hard as your fingernail, is too soft to be considered a true jewel.