Perhaps the most spectacular grotto along the Algarve coastline.

This small chapel is built of human bones and decorated with a golden skeleton.

The world's oldest bookshop still in operation.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

University of New Hampshire holds the documentation and artifacts of local alien abductees.

Final resting places of a husband and wife who became famous for their claims of extraterrestrial abduction.

A gas station and a state sign commemorating the most famous claims of extraterrestrial abduction.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The woman who helped save 15th-century France was born in this humble home.

The Nobel-Prize-winning author of The Stranger is buried beneath a simple gravestone in a sleepy French village.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

An unsettling shrine dedicated to the ravenous beast that prowled 18th-century France.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

Legend has it this 11th-century castle was paid a visit from the devil.

This mountain trail inspired Nietzsche to complete his magnum opus.

An atmospheric, medieval-themed book store hides in a 13th-century underground space.

Figures of unknown origin carved into the surfaces of underground caves.

His "Lionheart" is entombed separately from the rest of his body.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

A unique zoological park home to over 30 species of wild cats, both big and small.

Perhaps the most beautiful of preserved saints, with a little help from Paris.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.