This plaza is home to a number of works, including Montpellier‘s own Arc de Triomphe.

Get a close-up look at a 16th-century Basque whaling ship at this factory and museum.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

A unique seaside cave where Aleister Crowley faked his own death.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

Strange rumors surround the artist who created these solemn metal guard dogs.

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

Started as a kitchen garden, now the second largest botanical garden in the world.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

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

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This hydraulic power system in London was, at one time, seen as a rival to electricity and the last of its kind to shut down.

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This ancient Egyptian obelisk still bears the wounds of World War I.