A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Statue of death tucked in the University of Medicine courtyard.

This museum houses an imposing skeleton army comprised of creatures great and small.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Statue of a decomposing prince that once held his heart in its hand.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

A towering baroque basilica jutting out of the French countryside.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

The last bastion of Roman presence north of the Alps looms over a German town.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

World's largest barrel containing an inn.

A former Nazi lookout tower with a magnificent view of the Rhineland.

This German bone house contains the remains of some 20,000 souls.

The final resting place of the famed German pilot, the "Red Baron."

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

There's an exclusive Beefeaters pub hidden in the Tower of London.

One part local history, 99 parts gruesome haunted house.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.