An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

This 14th century wine cellar is home to the oldest barrel-stored wine in the world.

There has been an astronomical clock on this spot since the 14th century.

Remnants of a cone-shaped Nazi bomb shelter.

An old slaughterhouse now holds the largest collection of pig artifacts.

This old wooden funicular railway leads to a cemetery in the forest.

Named after a lodging site that existed nearby, a bridge has existed at this location since 1455.

An ordinary lamppost situated in the middle of Cambridge has an unusual moniker and history.

One of several Lilliputian portals that are ready to transport passengers to other dimensions, if they can find them.

A complicated contraption for telling time by the moon.

An extraordinary library and archive dedicated to the history of the Arctic and Antarctic poles.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

The curios of pharmacist and collector Henry Wellcome.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This sandstone plateau once served as a stronghold for Lesotho's King Moshoeshoe I and his subjects.

Take a step into the Cretaceous Period with these preserved dinosaur tracks.

An 18th-century hideout became a permanent and ongoing residence for one Lesotho tribe.