A Nesting Doll of Churches.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

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

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

This former royal palace with gorgeous gardens became the first museum in Morocco.

Traditional 11th-century outdoor tannery.

Mosaics, storks, and brothels—this ancient city has it all.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

This picturesque medieval monastery guards a small trove of historic treasures.

Art becomes an enchanting part of the environment at this wooded sculpture park.

Oslo's historic toboggan run has been letting thrill seekers slide from train stop to train stop for over a century.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

For over 300 years this little carving has been the city’s good luck charm.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

A giant interactive periodic table with real samples of the elements.

Looming communist pillar with a Czech twist.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Locals say the stone that marks the spot where the gallows once stood can lead you astray.

Be(w)ar(e) the moat around this historic Czech castle.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.