London's smallest police station is barely the size of a phone booth.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

An unusual round church in London with a Templar past.

The Bristol Camera Obscura housed in an ancient windmill.

A Gothic cathedral created from volcanic rocks.

Eighteenth-century home, where Herschel discovered the planet Uranus.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

Commonly acknowledged as the only public monument to the Devil himself.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Early habitat dioramas and home of the elusive gaff, the skvader.

Pyramid shaped monument with a tall tale attached.

An ancient Egyptian temple in the middle of Madrid, Spain.

It houses the remains of a 17th-century version of the Titanic.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.