A pub that is literally in the middle of nowhere, but continues to do business.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A house of bones — but nobody is quite sure to whom they belong.

At the United Kingdom's only residential library you can sleep among the books.

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

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

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.

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

400-year-old garden, restored to beauty.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

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

Hear the quietest sound from across the dome.

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

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

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

The curios of pharmacist and collector Henry Wellcome.

The longest hedge maze in the world.

A tongue-in-cheek arcade where the games are based on everyday life.

360° views of the city plus five floors of optical illusions and hands-on science.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

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

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

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