Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

The Pope’s secret escape route.

The Greek island's old British cemetery feels like a forgotten garden.

The ghost town where the villagers refuse to leave.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A battle between nature and architecture in the Cambodian jungle.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

Ha Long Bay's "Cave of Surprises" houses a popular phallic rock formation.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

This blowhole is supposedly caused by a trapped monster.

Submerged lava formations create incredible waterworks.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

One person's lost luggage is another person's treasure.

The world-record holder for the longest bridge stretching continuously over water.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

10,000 flowered plants bloom in the City of Roses.