A whimsical cottage from the 1300s with a preserved Victorian-era post office inside.

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

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

This former Welsh metal factory is now a lovely abandoned relic but was once one of the industry's world leaders.

Go deep down into the earth to experience the world of Welsh coal miners.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

Legends say that this small island was the final resting place of the Welsh saint of lovers.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

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

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

A breathtaking flower tunnel bursts with beautiful golden blossoms.

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

This tower is all that remains of a once-famed chapel.

Picturesque ruins once held off mighty armies.

This ancient abbey now lies in majestic ruin behind a caravan park.

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

Largest lake in Great Britain measured by surface area.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

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

Northern Ireland's Brobdingnagian stepping stones.

Famously misunderstood wonder of the ancient world

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A granite plane marks the site where a French aviator completed the first airplane flight across the English channel.