The remains of a concrete ship sit on a sandbank between Ballina Quay and Belleek Woods.

This rare and ancient Christian relic is one of Ireland’s oldest freestanding stone crosses.

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

This supermarket offers shoppers a window into the past alongside their groceries.

A stone wall that mysteriously moved three feet from its foundation.

Impressive mining ruins overlook a spectacular view of Ireland's Copper Coast.

A massive Celtic cross secretly growing in an Irish forest.

A strange egg in a mucky bog of western Ireland marks the spot of an aviation milestone.

Some of the saint's blood and bones are said to reside in Dublin.

A proud bronze billy stands as an eternal symbol of Ireland's oldest festival, where a goat is made king.

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

This natural sea arch highlights Ireland's rugged coastal beauty.

Petrified footprints of one of the very first vertebrates to walk on land.

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

The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

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.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

A monument marks the beginning of the longest north-south road in the United States.

This candy-striped tower is the farthest east you can go in the United States.

The highest point in Maine is a grand gift to the state citizens that also happens to be one end of the Appalachian Trail.

Not one, but two of Frank Lloyd Wright's architectural masterpieces nestled on the same street.

Even Henry David Thoreau found this glacial pothole irresistible.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.