Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

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

Now nearly dry, this lake is said to be the ancient home of the Lady of the Lake, and was once thought to be bottomless.

This 13th century castle is chock full of ghosts and impossibly rare cows.

One of England's most famous churches hides a pair of little known architectural treasures.

The nearly 200-year-old folly has a secret spiral staircase hidden in one of its pillars.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

A million and a half tons of earth were used to create one of the world's largest land sculptures.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

Grab a cuppa at England's first and only domestic tea plantation.

Built by the patron saint of illusionists this Elizabethan manor house is riddled with secret cubbies for hiding priests.

An intriguing three-sided folly is a testament to one man's devotion to Catholicism and the number three.

This skewed English house has looked like it's going to fall over for centuries.

The curious and tiny collection contains some very odd objects.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

A perilous medieval road leading right into the sea.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

This mysterious underground cave in Shropshire dates back to the 18th or 19th century.

This antique prison is a tourist attraction with a sordid past.

This tiny little pool is said to be home to a malicious mermaid named Jenny Greenteeth.