A unique piece of graffiti offers a little slice of local history and mystery.

This bell tower is the only one of its kind in the Netherlands and was a symbol of prestige.

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

One of the shortest streets in York has an especially odd name.

The modern birthplace of Irish freedom.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

An Italian restaurant became a rock-and-roll hangout and the lair of the "Hollywood vampires."

These subterranean storage areas hold emergency water reserves.

A monumental cross hides in the trees in Golden Gate Park.

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

A hugely vast Irish landscape of barren rock that stretches for miles.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This network of narrow, medieval passages has the most delightful name.

An architectural oddity hides in plain sight on this iconic London bridge.

This spooky statue sits outside a famous Prague theater.

You can spend the night in Dr. Frank-N-Furter's castle.

The ruins of a medieval monastery named after a type of tree.

These six walrus head statues harken back to a time when this area wasn't far from the oceanfront.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

It should come as no surprise that the world's largest artichoke lies in the town that calls itself the "Artichoke Center of the World."

This bridge was constructed from the rubble of the infamous Bastille.

A restored 1920s cascade stairway provides one of the best views of Oakland's Lake Merritt.

A cake-themed art installation tucked away in historic Chinatown.