Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

This neighborhood of futuristic ball houses looks like an alien settlement in a science fiction film.

A one-of-a-kind collection of a unique medium.

A museum dedicated to restoring vintage aircraft, located at a working airport.

Enter the cabin of a life-sized Hindenburg replica.

See the computer’s history revealed over the course of 20,000 years.

A research lab and hands-on museum where visitors can experiment with retro technology.

This Croatian computer club features such gaming relics as the infamous Virtual Boy and an 8-bit Pacman machine.

Museum celebrating the history of computers, especially their role in codebreaking.

Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

Comprehensive gaming collection of over 30,000 electronic games and consoles.

This former steel and coal plant is now a neon-lit industrial fantasia.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

Museum celebrating the achievements of the Soviet space program.

Immortal combat in a Moscow museum.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

A spherical "micro-nation" in the heart of Vienna.

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

An abandoned saucer-shaped monument in the Bulgarian mountains.

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

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

Climb inside an iron crystal magnified 165 billion times its normal size.

The only surviving prototype of Buckminster Fuller's revolutionary car.

A former ironworks that was the first UNESCO industrial site.