In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

A hidden art gallery in an abandoned Warsaw fort.

Rebuilt remains of a temple to Roman god Mithras.

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

Stockholm's deepest subway station is also a stunning ecological wonder.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

This Stockholm light tower can be controlled by anyone with a smartphone.

The library's graceful rotunda is like a bibliophile's temple.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

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

One of Bristol's best-hidden gems has ties to Lord Byron, whence it became the nation's first reformatory school for girls.

The Bristol Camera Obscura housed in an ancient windmill.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

This 11th century tower is said to be the oldest building in Oxford.

Hidden in plain sight, this creepy sculpture watches from above.

The beloved fantasy novelist is buried near a church containing a whimsical etched glass window full of Narnia favorites.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.