The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

A museum marks and documents the site of the Titanic's launch.

These engineering masterpieces are a dominant feature of the Belfast skyline.

The father of Belfast medicine is buried in the graveyard of this 13th-century church, which now lies in ruins.

Northern Ireland's Brobdingnagian stepping stones.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

A stunning Victorian abbey and walled garden on a lakefront.

The ruins of a sixth-century monastery sit on the banks of the River Shannon.

A bizarre roadside attraction and the first instance of miniature golf in the world.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This historic train station has been converted to a locomotive themed hotel.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

This limestone outcropping was once a ceremonial site for ancient Native Americans.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

A statue honoring 44 continuous years of greeting passing ships.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

St. Augustine's record-setting narrow street was designed to protect against pirates.

Location of a reliquary containing bone fragments of 18 saints.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

In this case, 'zero' marks the spot where the iconic Old Spanish Trail ends.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

A tribute to Ponce de Leon's supposed quest for eternal youth.