This WWII plane died a quiet death, and is now a garden eel playground.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

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

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

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

A lush green oasis in the middle of Chicago.

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

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

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

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Towering basalt columns, a creation of fire and ice.

An underwater city for the dead.

Where manatees are the snowbird vacationers in these balmy Florida springs.

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The first declared National Monument in the United States.

A beautiful 62-acre Catholic shrine and botanical garden.

A trash dump made beautiful by nature's power.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.