# Jewel Cave National Monument

> One of the longest caves in the world, lined with calcite crystals. Tours sell out in summer, so reserve online; the Scenic Tour has hundreds of stairs, and t

Source: https://camping-spirit.com/places/b19-jewel-cave/

One of the longest caves in the world, lined with calcite crystals. Tours sell out in summer, so reserve online; the Scenic Tour has hundreds of stairs, and the visitor center is off US-16 west of Custer.

- **Nearest town:** Custer, SD
- **Category:** Nature & parks
- **GPS:** 43.7298, -103.8290

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