The sign at the garden gate reads: "These Plants Can Kill."

These crude contraptions were used to aid in the mining of lead, silver and gold.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

One of the last remnants of the Bessemer process that revolutionized steel production during the industrial age.

A headstone notes where the most famous of Robin Hood's legendary Merry Men is reportedly buried.

A large piece of modern art makes this roundabout the only one in the world with its own laser.

The near loss of the stately fireplaces at this medieval castle spawned some of Britain's most crucial historic preservation laws.

This little-known hero has been protecting "The Fens" for close to 400 years, and now from its most powerful challenger yet: climate change.

There's a strange stone hoodoo towering atop a wooded hillside and no one is quite sure how it got there.

This centuries-old canal known as the Cuckoo Dyke has a staircase of locks suitable for a giant.

The world's first military tank was designed in this English city amid the stalemate of WWI trench warfare.

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.

Eyam took steps to quarantine themselves and keep the plague from spreading.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.

This haunting stone chasm is a hotbed of mossy rock and English legend.

Seat of the Duke and Duchess of Devonshire for centuries.

The former home of a railway legend and the site of a gigantic labyrinth.

A poignant memorial to the 106 coal miners killed in three major accidents in Derbyshire.

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

When methane gas started seeping up from the ground, they picked up and moved the entire town.

This restored 17th century "conduit house," often mistaken for a watchtower, actually supplied water to nearby Bolsover Castle.

These abandoned coal mine towers near Sherwood Forest might soon boast the U.K.’s longest zip-line.

A 4,000-year-old burial site hides behind a roadside Burger King.

The English town of Mansfield likely got its name from this enigmatic breast-shaped mound rising abruptly from the earth.