This crack in France's seaside cliffs once hid a sinister secret.

These ruins reveal the remarkably intact layout of a Roman marketplace.

Trek up this glacier before it disappears.

Resting on a hill overlooking the coast, these medieval ruins look completely deserted save for their restored chapel.

From carts to cars, this leftover Roman bridge in France has managed to survive for centuries.

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

The sunken structure looks like the victim of a catastrophic flood.

This ancient theater was once the home of fierce gladiatorial battles.

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

A chapel on a volcanic core, marking the end of a successful journey.

Museum in a swimming pool where the water still flows.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

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

The world's tallest bridge is also possibly the most elegant.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

These quaint French houses dangle precariously over a precipice.

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

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

An icy lake tucked among jaw-dropping alpine panoramas.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The pile of books behind the dignified writer gave the statue a most undignified nickname.