Hundreds of notes give thanks to the patron saint of lost causes.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

One of the world's largest collections of medieval religious art.

A menacing statue of this mythical creature can be seen at the legendary site of the monster's lair.

This enormous 32-foot painting depicts Poland's greatest medieval battle in glorious detail.

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

Special benches that play Chopin's music are scattered throughout his native city.

Legend says this is actually a heartbroken prince waiting for his true love's kiss.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

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

These 18th-century paintings of Warsaw were used to reconstruct the city after World War II.

It's a mystery why these remains were found with no traces of their bodies in sight.

An artificial date palm stands as a memorial to Warsaw's Jewish community.

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

A strangely curved lamppost stands tall over this avenue in Rotterdam.

Metro station with a claim to rock n' roll fame.

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

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

A little slice of Japan and its aesthetics in London's Holland Park.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

This hauntingly beautiful cemetery outside a medieval citadel is full of winding paths and ivy-covered graves.