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

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

A trash dump made beautiful by nature's power.

Legends surround this jagged rock formation in the New Mexico desert.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Small Nevada town embraced its designation as the "Armpit of America" with an Old Spice-sponsored festival.

The drama of nature in full effect in this Nevada State Park.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

The first U.S. town to secede from the Union, only to vote themselves right back in.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This massive redwood tree has a hole in the base big enough to drive through.

An essential stop before plundering, BYO Cutlass.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

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

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

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.