Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

This World War II relic let Allied pilots know they were entering neutral airspace.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

The modern birthplace of Irish freedom.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

A corkscrew-shaped barn in Ireland.

An ancient neolithic tomb that only sees the sun twice a year.

Obelisks and stone pineapples in the Irish countryside.

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

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

Ancient mysterious ruts carved in the bedrock.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This subterranean necropolis holds three floors of antler-dug grave caves.

Stone Age solar temple is aligned with the sun on each equinox and solstice.