A hotel and restaurant serving as the mecca of kitsch.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A speakeasy takes on Chicago's drinking culture.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A modernist landscape of water and sci-fi concrete.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

One person's lost luggage is another person's treasure.

A lush green oasis in the middle of Chicago.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The world's longest known cave system.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

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

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Take a drunken tour inside the world's largest known geode.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Hollowed out cedar log tubs set in an ancient towering forest.