It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

The last inhabitants of one of the U.K.'s most remote islands were evacuated in 1930.

A modern English garden of eccentric beasts, follies, and oddities.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

A subterranean playground in an abandoned slate mine.

London's old-school healing garden.

Repository for more than 22 million pickled specimens.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The television series' iconic giant foot was borrowed from this classical painting.

One of the world's largest collections of pathological specimens.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

Surreal riveted sea forts once protected the Kent shores from German attack.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

400-year-old garden, restored to beauty.

A fantastic castle rumored to be the birthplace of King Arthur.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Remnants of a Victorian garden feature sitting in public woodland.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."