Whitewashed mosque contains the world's largest carpet.

The largest medieval water tank on the Iberian Peninsula is preserved beneath the Cáceres Museum.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

Legend has it this spring formed at the spot where a medieval Swedish king was killed.

The official meeting point for the oddly named governing assembly of ancient Sweden.

It was once nicknamed "the most bombed hotel in Europe."

The modern birthplace of Irish freedom.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Protecting the dead from opportunistic body snatchers.

A living memorial to the trees London lost during the Great Storm of 1987.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Look closely and you’ll notice that the color changes a third of the way up the tower.

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

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

A long-buried ancient ruin unearthed right in the middle of the city.

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.