The only castle in North America to ever house European sovereigns.

This ancient gaming tool was unearthed during the construction of this former town's central square.

A museum in the former home of Marxist revolutionary Leon Trotsky.

In Coyoacán, a pair of coyotes crown a public fountain in reference to the ancient Aztec name of the borough.

One of the oldest Christian churches still standing in the Americas, and almost certainly Mexico's oldest in continuous use.

Inside one of Guadalajara's oldest houses, you can find puppets and foam models of the city's missing buildings.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

One of America's oldest stadiums was also the site of one of the most brutal anti-labor acts in American history.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

This Old West hotel, the longest in continuous operation in the state of Arizona, is claimed to be haunted.

Stairs often replace streets on the steep slopes of this old mining town.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

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

Sip cherry liqueur at a bar dating back to 1840.

The devil-defying mark left by a saint as a boy is visible inside Lisbon's cathedral.

The tallest tower in Cáceres's Old Town.

A Roman bridge closed to car traffic in the 1990s now open to foot traffic.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A hidden medieval crypt where a famous legend says the devil used to teach black magic.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.