One of the oldest suspension bridges in the world blends in perfectly with a medieval castle.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

Surgeon, scholar, activist, eccentric. This statue remembers a curious figure in Wales’ history.

The only medieval bridge in Britain with its defensive tower still in tact.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

Britain's answer to the NSA is based out of this deliciously-named circular headquarters.

The patch of land below the memorial was gifted by the British to the United States.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

Nearly 2 billion seeds from 38,000 species are stored and processed at this visitable facility in a quiet corner of England.

The Origin of On the Origin of Species.

This foreboding medieval castle was twice besieged by barons rebelling against the English king.

Cemetery dating back to 1884, known for being the final resting place of the notorious Kray twins.

The last resting place of the famous Native American princess is marked by a haunting monument.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

This curious Tudor-era castle was once home to Napoleon's greatest adversary, the Duke of Wellington.

The Neolithic megalith was one of the first archaeological ruins protected by the British government.

A reminder of the dinosaur skeleton discovered in a local quarry.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

This star-shaped artillery fort protected the mouth of the Thames from the 16th century to the Second World War.

A granite plane marks the site where a French aviator completed the first airplane flight across the English channel.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A masterpiece of Art Deco architecture hidden in plain sight in West London.

A glacial pothole was once a hideout for a notorious Scottish outlaw.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.