The final resting place of New England's last "vampire."

A network of concealed passageways lies within a busy London Underground station.

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

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

This 1920s Dutch barge is now a floating bookstore.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

The stately remains of Llywelyn the Great's mighty fortress.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

An abandoned castle owned and ignored by Masons carries a cursed history.

After years of slow decline, a derelict Gothic castle is now being restored to life.

Picturesque ruins once held off mighty armies.

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

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

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

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

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

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

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