Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The final resting place of soldiers' loyal canine companions.

A six-ton wedding present for the King of the Scots.

Now in ruins, this abbey was the home of Tironensian monks for more than 400 years.

The ruins of a once-grand castle that played host to a tournament with 100,000 attendees.

This beautifully situated lakeside Roman settlement was likely built during the reign of the Emperor Hadrian.

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

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

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

A Neolithic tomb hidden among a spectacular boulder-strewn stretch of coast.

The remains of a small medieval chapel mark the legendary birthplace of the patron saint of Wales.

A unique flight of canal locks that owe their form to 19th-century cost-saving measures.

Preserved baths in a Victorian-era spa town frequented by the most famous people of its day.

This river ramp was once used by the elephants of a local circus.

The only pub in the world surrounded by an ancient stone circle.

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

Two standing stones are all that remains of a prehistoric installation.

Europe's largest prehistoric mound – burial site of a legendary king?

It's possible to walk inside one of the largest Neolithic tombs in Britain.

This commemorative stone was erected near the first Scout campsite.

Discovered on a shipwreck after more than 400 years, this Renaissance ratter tells a very waggly tale.

This genuine, blood red Jolly Roger was captured off the North African coast in 1790 by Admiral Richard Curry.

Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

The commemorative stone column conceals a secret laboratory.