This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.

This ancient Irish landscape boasts hundreds of legendary ruins.

This World War II relic let Allied pilots know they were entering neutral airspace.

Northern Ireland's Brobdingnagian stepping stones.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

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.

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.

The largest terracotta fountain in the world, built to commemorate Britain’s Victorian achievements.

One of the first monuments dedicated to the accomplishments of the great Vice Admiral, Horatio Nelson.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

Sweden's "good old days" painstakingly re-created in a model village.

It houses the remains of a 17th-century version of the Titanic.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

A stunning Victorian abbey and walled garden on a lakefront.

The haunting concrete remains of a Nazi pebble crusher can still be found in this small French commune.

This abandoned Greek island was the last active leper colony in Europe.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.