The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

Christ's blood allegedly preserved in a Belgian town.

A little sculpture with a large wardrobe.

A lone tower rises above the cliffs in a city park, offering fantastic views of the Connecticut landscape.

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

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

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

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

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.

Crumbling necropolis set high above Fez.

The oldest known university in the world is in Fez, Morocco.

Traditional 11th-century outdoor tannery.

This 16th-century Moroccan fortress-turned-armory museum offers prime views of the historic quarter in Fes.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

The world's most elegant power lines.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

A 16th-century Andalusian palace.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.