Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

A remarkable medieval structure born from a 14th-century disaster.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

Seat of the Duke and Duchess of Devonshire for centuries.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

Grotto replete with mystical designs laid out in glued shell mosaics.

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

The smallest pub in Britain was once a cabinet of curiosities and it still has the dead cat to prove it.

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

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.

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

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

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

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

The largest known medieval map of the world.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

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

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

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

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

A midnight snack that lights up the night.

A petite castle folly in the English countryside.