Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

The largest coin pyramid in the world is a carefully balanced stack of over 1,000,000 pieces.

Underwater roads undetectable from the surface used for escape routes from foreign invaders.

An exhibit dedicated to a Lithuanian partisan.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The topiary maze at the Habsburg hunting lodge.

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

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

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

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

Kentucky's anomalous peninsula projecting into the Mississippi River, site of legendary earthquakes and local feuds.