The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

A museum dedicated to the tragedy of Bloody Sunday.

These murals stand as reminders to the troubled history of this Northern Ireland city.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

This Georgian architectural masterpiece is the only cloth hall left in Britain.

The house in the middle of the motorway.

These ancient rock graves were featured on the cover of a Black Sabbath compilation album.

A hundred copies of Antony Gormley's naked body stare out across the water.

Once the last route taken by condemned prisoners.

The western face was supposedly left clock-less to snub the Welsh.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

A rare wooden coffin set vertically into the Gothic arch of an ruined church.

This 1776 beacon on the coast of Wales is said to have a ghost called Raymond, the last lighthouse keeper.

England's largest white horse isn't even white.

This incredible viaduct was part of the Victorian railway boom and helped the Midland Railway navigate tough terrain.

This amazing trail among the many waterfalls around Ingleton has been enchanting visitors since 1885.

These Roman ruins in England’s Lake District are 2,000 years old, but look pretty good for their age.

One of the highest Roman forts in Britain is set amid dramatic scenery on a notoriously difficult road.

A museum in England’s Lake District dedicated to the trusty pencil wants you to know the story of their World War II spy pencils.

Stonehenge has nothing on Castlerigg’s views.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.