Within the Saudi Arabian desert lies a 2,000-year-old ghost town made of stone and mud.

Giant reed houses made in the marshes of Southern Iraq.

Iranian tombstones shaped like male and female sexual organs.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This Russian religious complex is a Frankenstein's chapel that includes influence from almost all the major faiths.

Museum design and public transportation meet in this unique Russian train car.

Some of the world's only freshwater seals live in one very special lake in Russia.

Largest man-made excavation on earth!

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

A self-taught Siberian craftsman creates a fantastical and personal design for his 19th century village house.

A solar-powered primary school inspires hope and experimentation in a country ripe for energy innovation.

Space-age monument to an early 20th-century uprising.

Open-air museum with a large collection of Soviet-era statues.

This impressively complicated radioastronomy research center was once a tool of Soviet spies.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

Budapest's Communist-era statues, banished to the suburbs.

Mysterious craters may have been home to an ancient cult.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

An underground city of salt.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

This huge metal monument is slowly being stripped to its concrete skeleton.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.