The largest stone circle in the world has ended up bringing up more questions than it has answered.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

England's most notorious suicide spot.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

A book bound in the skin of an infamous criminal, along with countless other specimens.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

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

A mysterious artist-run cabinet of curiosities and library.

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

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

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

A unique waterfall that some believe attracts the fairfolk.

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

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

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

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

Hear the quietest sound from across the dome.

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

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

An unusual round church in London with a Templar past.

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Famously misunderstood wonder of the ancient world