The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Breathtaking and huge 430 year old maps of Italy.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

A fortified palace in the shape of a ship on the Thiou river.

A Gothic cathedral created from volcanic rocks.

This garden houses the remains of the ancient Greek port of Marseille.

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

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

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

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

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

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

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

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

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

Fighting the British and making game shows for over 150 years.

A massive base for the Nazis' most formidable weapon in the Atlantic.

For those late-night mollusk cravings.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

Old vessels have been transformed into artistic canvases in this unusual cemetery.