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

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

Single runway interrupted by a busy road that cuts across its middle.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

Cavemen, elephants, and eagles greet passengers driving through the town's main intersection.

This Bangkok high-rise looks like a rudimentary LEGO elephant.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

Bangkok's men with dangerous jobs come here in search of protective talismans.

Everything from a plane to your own two feet are needed to reach this jungle resort.

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

These crumbling towers are some of the last remnants of a centuries-old Vietnamese culture.

An extravagant monument to an extravagantly unpopular Emperor.

A small museum dedicated to Vietnam’s lesser-known Iron Age culture.

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

This antique shop offers affordable 15th-century Vietnamese ceramics salvaged from a local shipwreck.

Perhaps the only one of its kind, the nearly-forgotten site once held mortal (and rigged) gladiatorial games between tigers and imperial war elephants.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

Under Hanoi’s medieval citadel sits a secret military headquarters from the final years of the Vietnam War.

A gift from the Soviet Union in the 1980s, this is the only statue of the Soviet dictator in Southeast Asia.

Life-sized painted illusions let pedestrians blend in with the street art.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Monument to a brutal, ineffectual US bombing campaign and a sobering reminder of the human cost of the Vietnam War.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

These pastel-colored homes were built when the island of Macau was a Portuguese colony.