This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

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

An eerie, derelict amusement park in Berlin.

A slice of central Asia in the middle of Berlin.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

In the fictional world of Kcymaerxthaere, standing at this site just outside Vienna, Austria, the sky would have been found beneath your feet.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

Museum devoted to the artificial language of Esperanto.

A silly medieval mural preserved on the side of a Viennese house.

This cubist Vienna church building looks like some sort of alien stonehenge.

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

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

The beautiful baroque library of the Hapsburg empire.

The final resting place for the remains of 143 Habsburg royalty.

Macabre museum devoted to historical Viennese murders.