A quiet Sicilian village is home to a cafe that had an important role in "The Godfather."

This fresco-covered medieval monastery hangs from the side of a steep cliff.

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

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

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

Former hunting lodge of a duke who was an avid collector of impressionist works.

An odd museum dedicated to French fakes.

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

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

A bike train runs along a disused railway line through the tranquil French countryside.

One of the oldest masonic museums in Paris.

This collection of French root art looks like an indoor fairy wonderland.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

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

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

Historic medieval fortified city in southwest France.

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

An icy lake tucked among jaw-dropping alpine panoramas.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

Ancient paintings known as the "Sistine Chapel of Cave Art."

Paris' fabled purveyor of exotic taxidermy and natural history curios.

The history of radiation is on safe display at the foot of a radiation science laboratory.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

France's national museum of scientific and industrial instruments.