This street has over a half-dozen names, all at once.

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

A collection of intricate sculptures so small they have to be seen through a microscope.

The world's newest astronomical clock is also its most accurate.

This Ukranian fortress is one of the best-preserved medieval castles in Europe.

An extraordinary museum devoted to the pop art legend created by Slovak artists.

Welcome to the world's only museum dedicated to the Ukranian Easter egg.

A peculiarly shaped brass sculpture hidden in a courtyard in central Lviv

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

Mummified monks and the accidentally interred, in a 17th-century crypt.

Countless grotesque faces stare out from this eerie Prague art wall.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

Europe's second largest ossuary wasn't discovered until 2001.

A stunning bridge that appears as if it's lunging to the shore, and has a legend of a devilish architect.

Italian cave with exceptional acoustics and an unsavory history.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

A 16th-century horror show built in a lovely Italian garden.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

This ghost town in Belgium will lose its street art when it ceases to exist.

The remains of an encyclopedic sculpture garden later used as an internment camp.

This spaceship sculpture in the middle of the Slovakian capital looks like it just crash-landed.