An ornate plague column – built to celebrate life – claimed the lives of numerous artisans during its construction.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Be(w)ar(e) the moat around this historic Czech castle.

A surreal statue honoring Prague's favorite literary son.

This automated sculpture of two men peeing will spell out text messages with their micturition.

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Macabre astrological automaton clock dating to the late 1400s.

A church of bones, decorated with 40,000 human skeletons.

An enormous and lavish Gothic church in Czechia.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

Geometry and mystery come together in an epic show of octagonal masonry.

Water and windows define this defensive Italian well.

One man's quest to fix his toilet unearthed over 5,000 artifacts spanning more than 2,000 years of history.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

Southern Italy's spinning top village.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

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

A once-magnificent collegiate church is falling into ruin.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

Christ's blood allegedly preserved in a Belgian town.