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

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

This naturally-sourced hot spring is now home to a clothing-optional resort.

A technicolor place of worship for Elevationists.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

One of the smallest towns in the United States.

An experimental, automotive replica of Stonehenge.

Most comprehensive museum in America devoted to one ethnic group.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

Two hula hoops appeared on the tree after a storm, and the collection kept growing.

Eight feet in diameter and more than 24 feet around.

In rural Iowa, an imported 19th-century windmill overlooks an unlikely enclave of Danish culture.

The World's Largest Bull.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

Home with Gothic windows featured in a famous painting.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.