What was once a unique system of urban elevators is turning into a mechanical ruin.

This Soviet-era athletic and recreation facility is the highest ice skating rink in the world.

This sprawling market is a one-stop shop for traditional Kazakh foods, from mare’s milk to sheep’s head.

A brilliant turquoise lake in the mountains.

This stunning mass of ice spans 121 square miles and is still growing.

The most southern point you can drive to in the Western Hemisphere.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This scenic cable car ride glides 100 feet above Mexico City.

This laboratory has a remarkable concrete roof that measures less than an inch at its thickest point.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

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

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

These biodiverse university gardens form a green oasis amid the urban chaos of Mexico City.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

Meant to be one of the most extravagant hotels in the world, now an eerie, abandoned architectural gem in Mexico City.

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

The celebrated eyesore created by starry-eyed sweethearts.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Notorious artist squat renovated into legal studios.

These elaborate gothic monuments honor Verona's medieval lords.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.