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

This open-air mosaic gallery honoring an English artist took hundreds of volunteers more than seven years to create.

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

This historic building displays the remains of a victim of the devastating 14th-century plague.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

Fantastically decorated underground chambers built in the 1760s.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

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

Eyam took steps to quarantine themselves and keep the plague from spreading.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

Ship-sized kinetic sculptural fantasy.

This crumbling folly looks like an enchanted left over from Middle Earth.

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

A house of bones — but nobody is quite sure to whom they belong.

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

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

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

A open air theatre built on a cliff by an eccentric British woman.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

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

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.