The only pub in the world surrounded by an ancient stone circle.

The commemorative stone column conceals a secret laboratory.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

Tucked inside a South Bank bar is an epic expressionist chronicle of the 20th century.

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

A tribute to the intrepid explorer and his crew who perished in terrible conditions on an ill-fated expedition to the Arctic.

The Tudor-style cottage in the middle of the square is not quite what it seems.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

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.