South Dakota Vacation Guide - 2025 South Dakota Vacation Guide
Jewel Cave National Monument
2025-12-15 09:07:55
EXPLORE OUR National Parks
With over 200 miles of mapped and surveyed passages, this treasured resource is one of the longest caves in the world. See sparkling calcite crystals, strands of gypsum, delicate frostwork, and other rare formations that decorate the cave’s chambers.
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