Hilltop monument to the victory of a new nation in the Franco-Prussian War.

Legendary site where an evil bishop was devoured by rodents.

Along the banks of the River Rhine lies a park that seems unassuming, but beneath the surface lies a long and fascinating history.

This German bone house contains the remains of some 20,000 souls.

A statue dedicated to the antihero of the Nibelung legend.

Aged nearly 1,700 years, the world's oldest bottle of wine is probably still drinkable.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

A remnant of the Franco-Prussian War, lodged in the city's walls.

A futuristic rocket marks the spot where three borders meet.

Lucerne's central prison was converted into a tourist hotel with a bare minimum of changes.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

The world's longest and deepest train tunnel.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

This 1st-century CE Roman bath sits under a carpark.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

London's Victorian Tower of Babel.

Pop culture has helped to keep this iconic British building from being destroyed.

A bust of the entertainer and politician sits in an alcove at the Palm Springs Airport.

The Hopi-style structure was built by the man who discovered Desert Hot Springs' famous mineral water.

This giant spider sculpture made from the iconic car is one giant visual pun.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

You don't have to be a diplomat to visit the so-called Camp David of the West.

With beautiful views and every detail perfectly considered, one of the geniuses of modern architecture built himself the perfect home.