The defensive tower was built centuries ago to warn locals of Berber pirate attacks.

Originally planted by the ancient Carthaginians, this sprawling palm grove is one of the largest in the world.

Down this yellow brick road, visitors are treated to toadstool houses and massive mushroom sculptures.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

Have a seat with the father of modern computing at this Manchester monument.

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

This 47-story "M" needed 20 years to be completed

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Bacteria and algae give the salty water its bubblegum hue.

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

The oldest inn in England served brew to the crusaders.

Pop culture has helped to keep this iconic British building from being destroyed.

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

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

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

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Eighty million natural history specimens call this gargantuan museum home.

One part local history, 99 parts gruesome haunted house.

A restaurant and observation deck built in a unique broadcasting antenna.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

While most bridges allow roads to pass over water, this one allows water to pass over a road.

The tallest mountain in mainland Netherlands isn't actually very tall.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.