This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

A former sanitarium where soldiers were sent to recover in the healing waters of hot springs.

One of the "twins" in these falls on the Snake River was sacrificed for hydropower generation in the 1930s.

Evanston's historic railroad complex saved this rail town from reaching the "end of the line."

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

This vintage theme park is peak Christmas kitsch—and it's open all summer.

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

Catch two 18-foot-tall ranchers mid-brawl as you drive by on Highway 285.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

The last street in Pittsburgh that's paved with wood.

The god of wine stares out at passersby on this busy Pittsburgh thoroughfare.

This Civil War monument was designed by an eccentric architect and Gettysburg veteran.

Home of the only civilian casualty at the Battle of Gettysburg.

This remote river crossing was a popular campground on American westward expansion trails, and a former Pony Express station.

At the time of its completion, it was the tallest dam in the world.

One of America's largest retail chains got its start in one of its most remote rural destinations.

This sandstone building is a relic of the Overland Trail.

A local museum remembers one of the worst acts of anti-Chinese violence in American history.

Named for a prominent scout and explorer, this Wyoming state park encompasses a replica of an 1840s trading post, a 19th-century Army outpost, and early 20th-century automobile lodgings.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

Largest collection of mounted dinosaur specimens in the world.

A replica that won't float away.