Britain's only artificial surfing lake is nestled in the beautiful mountains of Wales.

This crumbling 14th century chapel became so unstable the roofing apparently collapsed during a wedding ceremony, narrowly missing the curate's head.

A whimsical cottage from the 1300s with a preserved Victorian-era post office inside.

A steep and winding road in the Yorkshire Dales passes by these deep natural potholes.

It might not be as impossible to reach as its name would imply, but just about.

A village on the east coast of England that has almost completely eroded into the North Sea.

A 17th-century church is nestled within the walls of a 15th-century ruin.

Some of England's last cave dwellers lived and worked within this huge cave.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

The site of a mysterious pony massacre is rich with extraterrestrial conspiracy theories.

You can crawl inside this atmospheric 5,000-year-old tomb.

Legend has it the famous Robin Hood would attend mass at this 12th-century Cistercian abbey in Sherwood Forrest.

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

These medieval monastery ruins are surprisingly overlooked by most tourists.

The remains of the wrecked steam trawler can be found on the beach at low tide.

An abandoned quarrying village turned commune is now a hub for learning the Welsh language.

The site of the most dived wreck in the UK.

The dramatic remains of an abandoned farmhouse sit high on the edge of a remote hillside.

This 17th-century pub once had a hole in its wall so the neighboring blacksmith could easily access beer.

A chaotic collection of coin-operated slot machines designed to delight and disturb in equal measure.

Centuries of human activity have forged an eerie landscape of ruins and craters on an exposed and windswept hilltop.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

The near loss of the stately fireplaces at this medieval castle spawned some of Britain's most crucial historic preservation laws.

This 15th-century fortification was built to defend bunnies.