This bell stars in a tragic love tale and is said to make wishes come true.

This grubby wall is said to be one of the Earth's esoteric energy centers.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

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

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

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

An underground city of salt.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

Now a museum, this building was once a 14th-century monastery and the place where the founder of the Dutch nation lived and was assassinated.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

Two stone columns flank the grand Venice square, but there were supposed to be three.

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

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

The only museum with its curator—and her pets—buried inside.