This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

Once the longest bridge in Ireland, this rusting span sits abandoned and overrun by nature.

The remains of this deep, dark mine have left behind a haunting rocky warren of tunnels.

Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

An ancient chamber filled with wonderful rock art and a Neolithic carving of a human face.

The home of Ireland's last leprechauns is officially protected by the European Union.

The ruins of a medieval monastery named after a type of tree.

Ireland's most northerly island is hauntingly beautiful. Its lighthouse was the last glimpse of home for many Irish emigrants bound for the U.S.

When the tide is high, you can see the Atlantic pushing up through a deep, jagged hole in the rock.

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

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

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

Climb right into the heart of this colorful Iceland volcano.

The world's only complete colossal squid specimen is on display at the Te Papa Museum.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

Some of the clearest water anywhere in the world.

A perfect turquoise lake colored with glacier dust.

Deadly scalding and one of the largest hot springs in the world.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

The once and future home of New Zealand's famed Pink and White Terraces.

This strange geological landscape erupts with sudden bursts of water.

A Maori village obliterated by an 1886 volcanic eruption.

The glacier tucked within a New Zealand rainforest.

These phallic stone spires once served as Tolkien's Paths of the Dead.