The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

This failed condo development was reborn as a street art hub.

A park filled with vibrant mosaics created by more than 300 folk artists.

One man's homage to the orange as realized through a long-term folk art labor of love.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

This micro-nation may be some sort of prank, but its constitution sure seems official.

Things aren't quite what they seem at this mind-bending museum.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

The enigmatic skull gazes out over the ruins of a once-great Mayan city.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

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

There is one corporation registered for every three square feet of space in this inconspicuous office building.

An underground city of salt.

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

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

A museum in the childhood house of a medical pioneer.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Padlocks cover this rickety footbridge with love.