The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

The modern birthplace of Irish freedom.

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

This ancient Irish tower could easily have stood in for Rapunzel's prison.

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

Experience a charming 1930s version of "infotainment."

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

Scattered throughout London are ancient remnants of the city's former bounding wall.

This luxury shopping lane has been protected by its own tiny police force for over a century.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

A unique sculpture park that specializes in the huge and bizarre.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Memorial to the 137 lives lost on a ship fire, the whole hulk of which washed up on the Asbury Park shore.

The site of one of history's most indelible and horrific tragedies.

The biggest solar telescope in the world helps reveal the secrets of our sun.

A reproduction of earth's many biomes.

A building so large that it has its own weather.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

"We Seceded Where Others Failed."