An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

This crumbling folly looks like an enchanted left over from Middle Earth.

Three bridges straddle a stream, one stacked upon the other.

This cramped crevasse saw the entire population of its island suffocated inside its depths.

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

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

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

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Museum about life, death, and cannibalism in the Stone Age.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

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

A unique waterfall that some believe attracts the fairfolk.

The fountain marks the area where hundreds of accused witches were burned at the stake.

This series of Scottish caves has no clear purpose other than baffling historians.

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

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

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

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

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

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

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