This massive sculptural work outside of Paris was four decades in the making—and it's still not quite complete.

The unique design of these skyscrapers in a Paris suburb led to them being nicknamed "cloud towers."

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

A seemingly endless landscape of pure salt stretches far across Bolivia.

This hotel is located on the edge of the world's largest salt flat and is made out of the only material around.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

The largest underground church in Europe.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Lady Liberty's original designer installed a little clone in this French fountain.

The world's largest reflecting pool is just two centimeters deep.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

A very uncommon water tank standing in the middle of the grapevines in Bordeaux nearly a century after its construction.

A young Gustave Eiffel assisted in the construction of this skinny metal observation tower.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.