Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

An encyclopedic collection of mammal penises.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Medicinal spa created with the discharge from a geothermal energy plant.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

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

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

Though they've since been renamed, these two streets hint at Dublin's darker days.

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

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

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

After being destroyed by IRA sympathizers, the ruins of this stately Irish manor have sat vacant for decades.

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

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

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

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

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

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.

A remarkably intact castle that once was the largest in Ireland.