At the time of its construction, this hydroelectric power plant was the largest in the world.

Certain traditions prevail on the least-visited island of the Aran Islands.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

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

A sacred well steeped in Pagan roots on the West Coast of Ireland.

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

On the clock tower at St. Anne's Church in Cork, you never know which face is telling the truth.

The world's only flying boat museum honors a small Irish village that sent 20th-century aviation to new heights.

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

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

The eerie remains of one of Ireland's oldest castles, said to be haunted by the ghost of a woman who brings ill fate.

This single room has survived the centuries with almost no deterioration.

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

This beautiful site is where the first transatlantic telegraph was sent from.

A giant red chair bolted to a rock on a remote mossy hillside in Iceland.

A black sand beach where glacial fragments wash ashore and look like sparkling diamonds.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

The most powerful waterfall in all of Europe.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

A sulfuric martian landscape that looks far better than it smells.

A real-life homage to the Rachel McAdams and Will Ferrell's fictional Eurovision musical duo.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

A geothermal paradise with bubbling mud pools and bright blue hot springs.