When it came to designing his own small office building, the eccentric architect wasn't afraid to show the world what he could do.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

This English medieval castle is where King John died of dysentery.

Exquisite carvings of leaves, Green Men, and the occasional dragon adorn a medieval chapter house.

In this medieval fish bowl, the carp weren't pets.

Left by the Devil, an ancient quarry or just plain old erosion, this enigmatic rock pillar rises 28 feet from the hillside.

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

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

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A sweet symbol marks the place where torturous executions were once carried out.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

A collection of early 19th century trams set in a reconstructed period village.

The world's first successful water-powered cotton mill paved the way for the factories of the British Industrial Revolution.

A seaside town with no sea in sight.

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

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

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

The oldest inn in England served brew to the crusaders.

The whimsical twist of this spire was either caused by the Devil, an unexpected virgin, or lead.

This muddy wooded valley and the ancient structures it hides are said to be the favored haunt of the legendary Friar Tuck.

An enigmatic natural rock formation with a manmade passage cut through the center.

The undercroft is a spectacular example of medieval Cistercian architecture.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

This Victorian marvel of engineering and artistic prowess is nicknamed the "Cathedral of Steam."