Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

Giant statue of a disembodied head.

This hidden natural fountain issues forth a steady supply of supposedly healing water that tastes like rotten eggs.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

The largest of only eight working transporter bridges left in the world.

One of the last doorless, continuously moving elevators still in use in the U.K.

Once the largest unsupported dome in the world, beating out the Pantheon and St Peters in Rome.

The last manually operated turntable ferry in the world.

The abandoned fishing village was swept right into the sea.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

17th century puritan church with connections to the Salem Witch Trials.

These morbid carvings remind churchgoers of the inevitability of death.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

Abandoned boats decaying in the largest ship graveyard in mainland Britain.

A stretch of land where the sour-sweet vegetable is cloaked in darkness and grows so fast you can hear it crack, squeak, and pop.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

A brick foundation and piles of listing building materials are all that remains of this World War II POW camp.

These ornate arches show how the course of the River Thames has changed.

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.