An underground city of salt.

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

A surreal museum of extraordinary industrial objects.

This historical air terminal in Houston is slowly becoming an aviation museum dedicated to the city's aeronautical history.

The famous aviator's final resting place is a study in natural beauty.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

A world-class collection of mechanical musical instruments and automata.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

An 18th-century home taken over by antique automatons and musical machines (Closed).

Ship-sized kinetic sculptural fantasy.

Museum of amazing old toys and automata.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

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

A curious collection of mechanical moving figures.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.

"Alleys of Stone" form natural mazes in Spanish natural park.

The longest hedge maze in the world.

An abandoned saucer-shaped monument in the Bulgarian mountains.

A small town Romanian cemetery filled with darkly humorous gravestones.