For the experienced, Wind and Jewel caves offer wild, lantern-lit trips off the paved paths. South Dakota keeps its best rewards for those willing to leave the pavement behind.

Both parks offer ranger-led wild caving trips for prepared visitors.

What sets it apart

Crews continue to map new passages in each cave every year. It is the kind of specific that turns a passing curiosity into a lasting fascination.

Wild routes involve crawling, climbing and total darkness beyond the lights.

Why it matters

In the end, the story here is really a story about the northern plains and the people drawn to them. Come prepared, respect the land, and South Dakota's wild country will give back in kind.