An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

On the edge of the Valles Caldera National Preserve, these rock formations create an eerie landscape.

A beautiful red-faced slot canyon in northern New Mexico.

The world's longest known cave system.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Visit this playground of waterfalls, caves and sinkholes.

A natural sandstone bridge hidden in the Sewanee forest.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

These early tent-shaped grave coverings are unique to Appalachia.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

In the hometown of the Grand Ole Opry star is a larger-than-life memorial statue made entirely from chicken wire.

Crumbling Kennedys and a decaying Tecumseh are just some of the haunting remains of one man's cement art trail.

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.

The first full-scale tunnel built in America is short but scenic.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

Buttermilk biscuits so nice, you'll say “yay” twice.

A rainbow of kulfi and falooda flows from this Indian-style ice cream parlor.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

Divinely-inspired village houses 6,000 dolls, plus strange and lovely outsider art.

This 19th-century ghost town offers a stunning view of Lake Michigan and a journey through the region's industrial past.

Largest outdoor staircase in the United States.

Covering 37 subterranean acres, this Armillaria gallic is a famous fungus with its own festival.

A charming remnant of 19th-century fishing towns sits on Michigan’s Leelanau Peninsula.