The most visited, and possibly most controversial, museum in Germany.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A crumbling cathedral condemned by an earthquake.

This Costa Rican topiary park is a surreal garden of unearthly delights.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

Hamburgers are intensely proud of their tunnel beneath the river.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Four antique Baldwin trains are kept on display in the Mal Tiempo train depot.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

Mexico's astounding mummy museum with "the world's smallest mummy."

Frida Kahlo's childhood home, now a museum of her life and works.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

A 16th-century Andalusian palace.

The world's largest wooden structure.

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

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.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

A once-secret library of Freemason history in Catalonia.