The largest flower auction house in the world.

A statue of the second-tallest Dutchman in history.

Where royalty waits in the height of luxury.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

Go inside a revolutionary, cage-less zoo where 35 species live and some of them roam free alongside their human visitors.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

Built in 1547, these ruins lie on a rocky promontory in Ballintoy jutting into the wild ocean waters below.

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

This former World War II torpedo testing location is now an important nesting site for migratory birds.

The atmospheric road was never meant to be so creepy.

Northern Ireland's Brobdingnagian stepping stones.

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

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

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

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

A retired military stronghold on the rolling green coast of Donegal.

These murals stand as reminders to the troubled history of this Northern Ireland city.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

Every year locals give the bear a fresh coat of paint to preserve its signature goofy grin.

This rustic, flower-lined pathway once had very little in common with its namesake.

This gnarled old tree supposedly sprouted from seeds kept in the pocket of a 16th-century Spanish sailor.

A brisk climb up this solitary peak leads to the origin story of a towering figure in Irish history.

The stone that rocks no more.