Europe's first floating restaurant is home to a hilarious legend.

The skeletons, demons, and corpses serve as a warning of the terrors of Buddhist Hell.

Try not to get slimed in Tribeca.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Rows of stone statues are dressed up to mourn children that are lost before birth.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

The longest and tallest aqueduct in Britain can actually be sailed across.

The silly symbol for an underground protest group is now scattered around the city.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

This modern monument to pagan belief looks like it was transported straight from ancient times.

Could this grave be the true resting place of legendary gunfighter "Doc" Holliday? Unclear.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

The island of Lanai in Hawai'i is a paradise for cats and cat lovers.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

A lesser-known part of the Kinsey Institute is this impressive collection of art, artifacts, and material culture related to human sexuality.

American soldiers discovered Europe's best one-liner at the end of World War II.

A 19th-century Gothic, castle-like statehouse by the Mississippi River.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A mysterious echo seems to defy the laws of acoustics.

What happens here stays here – unless it affects the whole world.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.