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

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

These temples are among the oldest free-standing stone buildings in the world.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

This unique building in the main square stands out among the city's typically Baroque architecture.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

This church is named for one of the most dramatic tales in the early Christian church.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

The bomb-ravaged remains of of a colossal Neptune.

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

This tiny chapel withstood a massive mudslide and flash flood.

Every year, the town of Menton, France, turns lemons and oranges into giant sculptures depicting windmills, dragons, and more.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

This mountain trail inspired Nietzsche to complete his magnum opus.

A fortified palace in the shape of a ship on the Thiou river.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

Swiss vineyards in a UNESCO heritage site.

At 929 pounds and 26 feet tall, this stainless steel fork can only be used by the likes of King Kong.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

Constructed along the shores of Lake Zurich, this pavilion is a walk-through work of art.