The final resting place of hundreds of Polish airmen who died fighting the Nazis in Britain.

Locals spent years successfully fighting to save this beloved Brutalist behemoth from demolition.

This Iron Age hill fort remained hidden until a series of storms revealed its history.

This unusually-named reservoir found a second life as a nature preserve.

This castle once belonged to one of the most prominent families of medieval Carrickfergus.

These grandstands are among the oldest continuously used stands in the world.

The remains of a 13th-century stronghold built by the Welsh prince known as Llywelyn the Last.

Cycle, walk, or run up and down on an old historic railway path.

This Scottish bay still reveals evidence of its days as a seaside swimming pool.

From fortification to folly, this hilltop structure has undergone many changes in the last 800 years.

The last two abbots of this monastery were both executed by Henry VIII.

The house in the middle of the motorway.

A prison tower–like edifice honoring a beloved local benefactor.

Once a training ground for Olympic athletes, this artificial ski slope has fallen into ruin after a fire in 2012.

Once upon a time these giant concrete tanks were used by local fishermen to clean their wild-caught mussels.

The rusting relics of Southampton's former luxurious flying boat industry.

Model aircraft soar over 360-degree views of the countryside at the start of England's oldest road.

A 168-foot tower, part of the abandoned Chester Leadworks facility.

Parts of this former military training ground may have inspired parts of J.R.R. Tolkien's famous fantasy series.

This rocky outcrop served as a quarry for some of the bluestones that sit at the center of Stonehenge.

This former World War II artillery defense site was built to guard the industrial city of Glasgow.

The largest timber structure in Europe.

This jewel of an engine is one of Northern England's finest surviving legacies of the Industrial Revolution, even catching the eye of Henry Ford.

The last surviving roundhouse in the United Kingdom also plays host to a popular annual beer and music festival.