This open-air sculpture museum is located under a bridge in the center of Madrid.

This piece of early engineering is rather unknown despite its location in the heart of Madrid.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

This art installation at an abandoned lipstick factory has distinct anti-capitalist vibes.

Single runway interrupted by a busy road that cuts across its middle.

This sculpture encompasses the emotion of rail travel.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

Along the pavement of this neighborhood in Madrid are quotes from famous authors.

A mysterious suspended hand greets unsuspecting visitors at the Tower of London.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Look up from the busy streets to discover how time is kept!

These primitive rock paintings include a very beloved depiction of a woolly mammoth.

These 7,000-year-old cave paintings depict life in Neolithic Spain.

A book bound in the skin of an infamous criminal, along with countless other specimens.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

Britain's only herd of free-ranging reindeer.

Designed to allow funerals to proceed over the River Dulnain.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

On a corner of the Ardmeanach peninsula on the Isle of Mull, a 50 million-year-old fossil tree hides in the coastal cliffs.

This stately estate house features a tower covered in a bright, modern mural.