Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

This Scottish bridge seems to compel dogs to leap to their death.

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

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

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

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

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

The heads of two giant mythological water horses honor Scotland's horselord past.

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.

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

A clock designed to run with perfect accuracy for 10,000 years.

A subterranean playground in an abandoned slate mine.

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

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

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

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

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

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

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

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

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

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