A thousand year old oak tree survives in Liverpool.

19th century tunnels burrowed under Liverpool.

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

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

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

After mysteriously refusing to surrender at the end of World War II this sunken submarine was only salvaged in a search for Nazi gold.

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

This sculpture is an instrument played by the swell of the seas.

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

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

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

The decaying ruins of Wales' first asylum for the mentally ill.

These fantastically named natural pools look like something out of a Scottish myth.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

Ancient Bronze Age rampart that was used into the middle ages.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

One of Ireland's most infamous prisons for rebels including men, women and children.

A peace symbol in Northern Ireland is among the world's largest hedge mazes.

A museum marks and documents the site of the Titanic's launch.

A corkscrew-shaped barn in Ireland.

Huge standing stones mark a site of megalithic mystery.

Obelisks and stone pineapples in the Irish countryside.