A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

A cluttered and astounding collection of antiquities and curiosities.

This coffee shop lies hidden beneath a historic church.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The inverted pyramid design of this station stands out amid Bratislava's urban landscape.

A Byzantine-era church hidden in a wooded area below the Acropolis.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

These caves secretly held national treasures during World War II.

Where commuters walk through remnants of an ancient Greek necropolis.

The ruined doorway is a portal to the building's turbulent and torturous past.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

A sharp sculpture made of thousands of pieces of jagged glass.

An ancient octagonal weather station named for the eight Greek gods of wind.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This pink watchtower served as the seat of the Greek government after independence from the Turks.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.