This neolithic stone grave has been altered and restored so often its now more neo than lithic.

Picturesque ruins once held off mighty armies.

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

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

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

The remains of centuries of copper mining appear like an alien landscape.

The longest and tallest aqueduct in Britain can actually be sailed across.

Stroll through Welsh history in a village of reconstructed structures.

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

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

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

A subterranean playground in an abandoned slate mine.

Three bridges straddle a stream, one stacked upon the other.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

This former military airfield's claim to fame came from a lucky accident during the Second World War.

The Belgian library displays burned books that were salvaged from the fires of both world wars.

A surrealist timepiece by the artist of melting clocks.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the century.

Paris' linguistic guide to the international language of, yes, love.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The oldest stone house in Paris was built by its most famous alchemist.

There has been an astronomical clock on this spot since the 14th century.

This 14th century wine cellar is home to the oldest barrel-stored wine in the world.

One man's dream has turned into this naturally growing chapel made of almost nothing but trees.