The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Eighty million natural history specimens call this gargantuan museum home.

One part local history, 99 parts gruesome haunted house.

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

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The underground sanctuary of a mysterious ancient cult.

The middle finger of modernity.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

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

A French museum of wrought iron.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

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

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

His "Lionheart" is entombed separately from the rest of his body.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.