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

Since ancient times these picturesque springs have been providing bathers with healing waters.

Jean Tinguely's bizarre monster sculpture is hidden deep in a forest.

Walk through living pictures and music in the Cathedral of Images.

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

There is a strange little carving of a person seemingly crushed by a pillar behind the remains of St. Thomas Aquinas.

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

A colossal sculptural lion built by the same man who designed the Statue of Liberty.

Green labyrinth formed by a karstic maze hidden in a preserved oak forest.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

Figures of unknown origin carved into the surfaces of underground caves.

A unique underground structure dating back to the 1st century BC.

If they push on just the right spot, even the weakest person can move this titanic boulder.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

An unusual number plate signifies the building's saucy past.

A tiled, multi-level garden of survival in Lyon.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.