A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

An ancient chamber filled with wonderful rock art and a Neolithic carving of a human face.

A Roman spa buried deep beneath the City of London.

A group of glacial erratic boulders are improbably balanced on white limestone pedestals.

A winding medieval path was used by mourners to carry their dead to the nearest church.

The abandoned funicular tunnel was a secret base for the BBC during World War II.

Denmark’s never-ending bridge.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A 17th-century church is nestled within the walls of a 15th-century ruin.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

In the quiet village of Fulmodestion, the ruins of a medieval church remain hidden among vines and foliage.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The curios of pharmacist and collector Henry Wellcome.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

A complicated contraption for telling time by the moon.

The train engine is tucked under an apartment building on a quiet Tokyo street.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This sawtooth mountain range still bears the strangely lovely marks of its history as a medieval quarry.