This unique rock formation is quite the local celebrity, although one day it may come crashing down.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

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

Relive a Polish uprising via an enormous, century-old cyclorama.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

A striking public sculpture representing the period of martial law in Communist Poland.

A collection of old neon signs from all over Poland line a secluded courtyard.

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

This 19th-century pub features stained-glass windows celebrating Victorian-era "champions."

A mysterious shape catches the eye in this 16th-century painting.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

Its collection includes a broad array of social, geographic, graphic design, and political history.

A quiet memorial to those who died saving others in the heart of the City of London.

This museum tucked below a charming cafe gives a brief snapshot of photographic history.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

A cluttered and astounding collection of antiquities and curiosities.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Eighty million natural history specimens call this gargantuan museum home.

An unusual round church in London with a Templar past.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

Follow the original medieval paths that wind through this intriguing section of the city.

All unmarked mute swans on the Thames are owned by the Queen per a tradition that began in the 12th century.