America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Lie in a hammock where George Washington stood.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

One of only two commuter aerial tramways in the United States.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A local prank turned town icon.

These disused steel furnaces are now haunting ruins that may one day be a national park.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A fictional town that was briefly brought to life before fading once again out of existence.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

This modest marker near Notre Dame identifies the very center of Paris.

This one-time health resort was used by aristocrats around the world.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

A winding, cliffside stretch of road overlooking the Delaware River.

The world’s first penitentiary, meant to be humane, drove men insane.

How did a French journalist’s grave become the sexiest statue in the cemetery?

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

A small section of Boise, Idaho maintains the unique culture and traditions of the Basque people.

Jail from the 19th century that was built by inmates.