Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

At 207 feet, one of the world's longest continuous escalators.

Home to items never before seen by the public.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

"We Seceded Where Others Failed."

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

The only castle in North America to ever house European sovereigns.

This Costa Rican topiary park is a surreal garden of unearthly delights.

This staircase full of Mayan hieroglyphics is perhaps the largest single text in the world.

Largest pre-Lent festival in the Dominican Republic.

This replica medieval European village in the Dominican Republic was built by a Hollywood set designer.

The world's brightest bioluminescent bay.

The world's second largest single-dish radio telescope, once used to contact E.T.

An unrecognized micronation declared by Greenpeace to protect the glaciers of Chile.

A bright little alley in La Boca is a part of tango history.

What was once a unique system of urban elevators is turning into a mechanical ruin.

Go inside to really appreciate this 500-year-old technological masterpiece.

The only museum with its curator—and her pets—buried inside.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The bears of Bern have been a city highlight for over 500 years.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.