A Gothic cathedral created from volcanic rocks.

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.

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

One of the greatest maze designer’s greatest mazes.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Paris' linguistic guide to the international language of, yes, love.

France's most famous cemetery, with some of its most curious tombs.

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

These four fountains are said to have healing properties, with a glass of the 'miracle' water being given to Louis XII of France.

A fossil of a 30 million-year-old fish is unexpectedly hidden thousands of feet above sea level.

This deceiving white sand beach gets its brilliant hue from the chemical discharge of a nearby factory.

This artistic temple brings together multiple architecture styles, but is only an example of one.

The oldest scientifically dated tree in Europe lives on a remote cliff.

A magnificent Neogothic tomb hides within this Italian fairytale-like forest.

With its mine closed, this old village is starting to resemble a ghost town.

A dreamlike medieval church dug into the tuff rock, with unusual carvings and possible traces of the Templar knights.

When a massive landslide hit one of the world's tallest dams it created a tragic environmental disaster.

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

Things seem to roll, flow and run uphill on this short patch of road near Ariccia, Italy.

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.