A guitar mounted on a wall in Temple Bar honors the Irish musician.

This 18th-century fort surrounded by a moat was used to store gun powder and ammunition, and now sits in the middle of a large part in Dublin.

A devastating booze inferno poured through the streets, claiming several victims who drank it.

The house where the writer spent his formative years.

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

One of Ireland's most infamous prisons for rebels including men, women and children.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

See some of the world's greatest racing horses at this idyllic thoroughbred breeding facility and garden complex.

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

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

Dive for drinks at Croatia's first and only underwater winery.

A tribute to an iconic act of defiance from the Croatian War of Independence involving a small car.

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

The remains of a sunken military ship wreck visible through clear water.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

An ethereal glowing blue ocean cave in Croatia.

This Croatian island is for sale but no one is buying due to the dozens of accused Nazi sympathizers who were massacred there after WWII.

Gargoyle head that brings good luck.

This medieval city gate is now a blend of the past and the modern world.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Hidden within this iconic mountain are a set of World War II bunkers once used by German forces.