Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

The world's longest known cave system.

An ethereal glowing blue ocean cave in Croatia.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

A Hawaiian stairway to heaven—that you can't climb.

A semi-scholarly approach to sex.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

This South London cemetery holds the remains of more than 15,000 people.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

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

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

A battle between nature and architecture in the Cambodian jungle.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This structure among the trees was the result of divine inspiration.

A spectacular cave and a beguiling lake.

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

Thousands of well-dressed mummies below a monastery.