These unusual rooms on wheels are holdovers from the 1960s.

Built in the 1970s, this curious modular home found new life as a sundae-shaped ice cream stand.

A theme park made of glass, from the gleaming books on the shelves to the crystal fish in the mirror lake.

What was once supposed to be the symbol of a shining Afghan future is now a bombed-out ruin.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

The shortest in the world, this landing strip stretches a mere 1,312 feet before steep cliffs on either end plunge into the Caribbean.

A sanctuary for sickly, stray, or wounded donkeys.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A gallery of underwater art that can be visited by man and fish alike.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A massive underwater sinkhole made famous by Jacques Cousteau.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

You thought Santa Claus didn't exist, but it turns out you were wrong.

The first artificial white water river course in North America cuts right through an Indiana city.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

A glowing underwater cliff attracts marine life and divers in equal measure.

Massive volcano in the Andes is the farthest point from earth's center.

Beach instrument turned bed and breakfast.

This museum showcases the history and contributions of the U.S. Army to the medical industry, both on the battlefield and off.

Erosion and time have created a naturally-formed water park.

This life-size bronze statue remembers the tallest recorded human in his Illinois hometown.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.