A harbor town pays tribute to a heroic wartime carrier pigeon.

This tower once belonged to a castle fit for a knight.

This castle once belonged to one of the most prominent families of medieval Carrickfergus.

These huge glacial erratics are humorously named after a much much smaller bird.

The stone that rocks no more.

This Bronze Age tomb makes the most unusual front garden fixture.

This picturesque lighthouse at the edge of the Irish Sea looks like a giant stone pencil.

400 million years of erosion shaped these fascinating seaside caves, which made an appearance on 'Game of Thrones.'

A trail of "Game of Thrones"-themed doors carved from fallen trees from the iconic Dark Hedges.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

A map made up of 32 different materials, representing Ireland's 32 counties.

For fans of the stained glass art of Irish illustrator Harry Clarke, this church is the place to be.

One of the oldest lighthouses in the world, this structure was built more than 800 years ago.

A gated cross stands on the site where an Irish revolutionary met his end.

The remains of a 13th-century Franciscan friary have survived multiple attempts at destruction, most recently in 1921.

An important landmark in the history of algebraic logic.

A stunning medieval castle owned and restored by the famed actor Jeremy Irons.

A former fortified tower now houses a collection of classic communications equipment.

Oliver Cromwell once seized the land under this house, which included the ruins of a medieval abbey that the owner used to build his stately home.

A devastating booze inferno poured through the streets, claiming several victims who drank it.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

Just another ancient, mysterious Irish stone circle.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.