After years of slow decline, a derelict Gothic castle is now being restored to life.

A wildlife paradise, this island is one of the world’s most important habitats for burrow nesting seabirds.

A real-life Professor Snape once taught in this Welsh university building, which students of course nicknamed “Hogwarts.”

One family's environment-friendly hobbit-house in Wales.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

At the United Kingdom's only residential library you can sleep among the books.

The stately remains of Llywelyn the Great's mighty fortress.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

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

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

This abandoned asylum in Wales might look haunted, but it's still beautiful.

A subterranean playground in an abandoned slate mine.

A quartet of brightly colored mythical beasts stand sentry at this gateway.

Andrew Carnegie funded the building of almost 3,000 libraries across the world, this was the first.

This abandoned hospital village was once viewed as an innovative way to deal with mental illness.

A 16th-century castle unexpectedly nestled within a post-war housing development.

This once-majestic, now-abandoned Victorian castle has seen better days.

Now home to a drinking establishment, this building has a macabre history.

The United Kingdom's smallest working cathedral also serves as a quaint bed and breakfast.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

A former telephone box found new life as a photo booth and charity fundraiser.

A rare permanent monument to the Scottish Travellers.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.