Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

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

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

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

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

Go inside to really appreciate this 500-year-old technological masterpiece.

A crumbling hospital from the 1850s on Roosevelt Island.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

An abandoned quarrying village turned commune is now a hub for learning the Welsh language.

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

The decaying ruins of Wales' first asylum for the mentally ill.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

Bridge that died in war and was resurected.

A pair of connected skyscrapers form this symbolic gateway.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.