A tunnel of hardened lava along Maui’s famous Road to Hana.

Home to the deepest rift anywhere on Earth.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

An antique Beechcraft airplane serves as a giant windsock for people driving through the blustery open country of eastern Wyoming.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

The last Americana on Route 66.

This Taoist temple is the oldest continuously used Chinese temple in California.

Like a kitschy mirage in the Mojave, this eatery serves up classic 50s-style diner meals and a dinosaur sculpture garden.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Raised illegally, Reggie now lives at the Los Angeles Zoo after authorities spent years tracking him down.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

This giant temperature attraction created some giant electric bills.

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.