This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

These ancient ruins were the final resting place of King Henry II's mistress.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

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

It's possible to walk inside one of the largest Neolithic tombs in Britain.

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

Rare collection of medieval books under lock and key.

A well-studied colony of endangered bats roosts in this abandoned Victorian Gothic mansion.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

Legend says this ancient pagan site can cure all ailments.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

This Roman quarry once held secret masses and smuggler's contraband and is now home to rare species of bats.

A ruined castle has more than its fair share of legends and ghost stories.

A 14th century castle built on the seat of a mighty giant.

This tangled English forest looks like something right out of a fairytale.

The world's largest collection of witchcraft regalia.

A fantastic castle rumored to be the birthplace of King Arthur.

Cornish legend says these ancient circles were people turned to stone for playing hurling on a Sunday.

Perhaps the only prehistoric monument with its very own public bus stop.

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

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.