The fairy tale castle of the "fairy-tale king."

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

World's largest barrel containing an inn.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

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

The world's largest boar is a huge steel titan found at a French rest stop.

Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

The vibrant buildings in the “capital of the comic strip” celebrate the art form that made it famous.

The haunting concrete remains of a Nazi pebble crusher can still be found in this small French commune.

Ride the rails on a train harkening back to a 19th-century marvel.

Journey through the ruins of this ancient Roman temple dedicated to the god of war.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

The tomb of history's greatest potato promoter is surrounded by tubers.

A museum of carnival attractions where you are invited to ride the rides.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

The oldest and smallest cemetery in Paris is only open to the public twice a year.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The ruins of an abandoned cemetery are among the last remnants of the old village of La Boulaye before a wealthy landowner had it relocated.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

The first Russian Orthodox church in the Catholic city of Rome in almost a thousand years.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Breathtaking and huge 430 year old maps of Italy.