This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

The most visited, and possibly most controversial, museum in Germany.

A trail of "Game of Thrones"-themed doors carved from fallen trees from the iconic Dark Hedges.

The ancient tomb acts as a calendar that keeps perfect time.

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

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

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

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

These moss-covered medieval ruins tower atop the smallest of Ireland's Aran Islands.

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

Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.