This cramped crevasse saw the entire population of its island suffocated inside its depths.

A pub that is literally in the middle of nowhere, but continues to do business.

Fantastically decorated underground chambers built in the 1760s.

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.

This haunting stone chasm is a hotbed of mossy rock and English legend.

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

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

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

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

These ancient sunken lanes were naturally tunneled into the soft ground by countless footsteps.

The oldest inn in England served brew to the crusaders.

The monster at the center of the Darwin Center Spirit Collection.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

Fascinating town where normal life interfaces with the occult.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.