This strategically placed hill fort has served defensive forces from the Iron Age up until the 20th century.

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

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

The largest known medieval map of the world.

Rare collection of medieval books under lock and key.

Britain's answer to the NSA is based out of this deliciously-named circular headquarters.

Asthmatic Charles Hyett's son built a fantastical garden for his father to convalesce in, alas it was too late.

Gothic tower mentioned in Thomas Hardy poem "The Channel Firing."

Detailed sandstone carvings show an array of symbolism and adorable animals.

Beasts and branches swirl in sandstone carvings, interrupted by one strange creature.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

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

This crumbling headstone commemorates the first death by tiger in Britain's history.

This stretch of the River Severn where large waves flow against the current is the birthplace of river surfing.

A 200-year-old prison that now houses a peculiar crime museum.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

The designer of this railway tunnel added a birthday present for himself.

Abandoned boats decaying in the largest ship graveyard in mainland Britain.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

Eighteenth-century home, where Herschel discovered the planet Uranus.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

A dark Victorian well house now plays host to mystical waters and pagan shrines.

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

Fascinating town where normal life interfaces with the occult.