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

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

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

This 1920s Dutch barge is now a floating bookstore.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

400-year-old garden, restored to beauty.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

An incarceration museum on the spot of possibly the oldest prison in England.

The anatomical-pathological collection of a man who changed surgery.

This tangled English forest looks like something right out of a fairytale.

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

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

The longest hedge maze in the world.

The curios of pharmacist and collector Henry Wellcome.

One part local history, 99 parts gruesome haunted house.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

The world's largest collection of witchcraft regalia.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

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

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

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

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.