Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

This temple was constructed entirely by Roman soldiers.

England’s ancient oak tree has such an impressive girth, people have been hosting parties within the hollow trunk for centuries.

On a hill overlooking Loch Trool, a granite boulder marks the site where Robert the Bruce, King of Scotland, defeated an English army.

A square stone tomb marks the spot where six men were killed while holding a service in Caldoris Wood.

This former military airfield's claim to fame came from a lucky accident during the Second World War.

Quirky Welsh observatory unites art and science.

The world’s only museum dedicated to baked beans.

The remains of centuries of copper mining appear like an alien landscape.

A spiral staircase connects the limestone cave with Pembroke Castle, birthplace of King Henry VII.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

One family's environment-friendly hobbit-house in Wales.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

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

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

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

This abandoned asylum in Wales might look haunted, but it's still beautiful.

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

A breathtaking flower tunnel bursts with beautiful golden blossoms.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

Three bridges straddle a stream, one stacked upon the other.