An optical Illusion once believed to be an electrical phenomenon.

Northern Ireland's Brobdingnagian stepping stones.

This Irish museum in a historic 19th century market pays tribute to the glory of butter.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The modern birthplace of Irish freedom.

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

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

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

An unusual manor of stunning beauty, born out of a crippling disease.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

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

This aging storage facility is the world's largest brick warehouse.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

Louise Bourgeois' 30-foot-tall steel spider sculpture.

One of the largest underground systems runs under Canada's largest urban center.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

MIT students continue the legacy of beloved professor "Doc" Edgerton through learning by doing.

The Boston square dedicated to the dark poet who was born nearby.

This "life-size" depiction of Mickey Mouse as a half-lobster is both whimsical and a bit creepy, standing guard over the Boston waterfront.