This 317-ton walkable art installation is an homage to Korea's "City of Steel."

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

One of the world's largest amber altarpieces is housed within this reconstructed medieval church.

A peculiar trapezoidal building covered with wonderful humorous reliefs.

This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

Burlesque Hospital Themed Restaurant.

A centuries-old iron mine is now a paradise for explorers, divers, and spelunkers.

Tiny Swedish village with a distinct local phenomenon known as an "Elk Shower."

One man's fascination with Turkey led to this backyard mini-city.

An eclectic sculpture park rises atop a giant pile of ashes in Sweden.

This one-time health resort was used by aristocrats around the world.

The only natural cave bath in all of Europe.

The majority of the highest mountain in Poland is actually located in a different country.

Inside this Krakow church, an explosion of psychedelic color.

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

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.

The Suurhusen church tower in Germany leans over farther than the famous Leaning Tower of Pisa.

Used as an example in one of the first dictionary entries for "museum" in 1706.

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

A deserted 20-lane highway runs through Myanmar's empty capital city.

A 200-year-old prison that now houses a peculiar crime museum.

The controversial final resting place of the equally controversial first president of Turkmenistan.

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