This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

A moody and picturesque riverside ruin overgrown with vegetation.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

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

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

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

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

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