What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

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

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

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

This ancient Roman town was revered for the healing waters of its sacred spring.

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

A winery built on the site of a Gallo-Roman estate uses historical tools to recreate ancient vintages.

This fascinating abbey is considered the oldest monastery in the region.

Sculpture of a legendary French dragon.

It's safe—and permitted—to walk across these twin natural sandstone arches.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

The fifth-longest natural arch in the world, and the longest outside China.

A small oasis not far from downtown Moab.

A house carved into a rock in the 1940s.