The ancient tomb acts as a calendar that keeps perfect time.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

There might not be much left of these Irish ruins, but their linguistic legacy is still going strong.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

Petrified footprints of one of the very first vertebrates to walk on land.

This single room has survived the centuries with almost no deterioration.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

Fascinating town where normal life interfaces with the occult.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

100 year tradition of fist fights, marked by marble footsteps.

Go inside to really appreciate this 500-year-old technological masterpiece.

Venice's island of the dead.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

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

Historic medieval fortified city in southwest France.

French commune at the heart of conspiracies.

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

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

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