Long tunnels run under the ancient chariot racing circuit to the tower.

This Roman arena once played host to bloody gladiatorial battles.

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The hidden lair of an alchemist rediscovered in a 2002 flood.

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

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

Macabre astrological automaton clock dating to the late 1400s.

A surreal statue honoring Prague's favorite literary son.

Eighty million natural history specimens call this gargantuan museum home.

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

Locals spent years successfully fighting to save this beloved Brutalist behemoth from demolition.

A harrowing sculpture commemorates the four people shot down during the workers strike of 1842.

One of the few surviving street funiculars in the world.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

This unchanged Victorian park is rumored to have been the inspiration behind Peter Pan's Neverland.

The oldest inn in England served brew to the crusaders.

A curious urban windmill once owned by a renowned British mathematical physicist.

A striking 500-year-old mansion provides an unexpectedly sublime home for live deer and a menagerie of exotic stuffed animals.

Manchester's abandoned train depot lingers in a post-industrial purgatory.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

One of the highest Roman forts in Britain is set amid dramatic scenery on a notoriously difficult road.

These Roman ruins in England’s Lake District are 2,000 years old, but look pretty good for their age.

This tower was created by the area's vicar as a shelter for exhausted travelers, complete with a fireplace and breathtaking views.