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

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A fitting attraction for the corn capital of the world.

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.

The first declared National Monument in the United States.

Modeled after a famous church in Vienna, Austria—but in Helena, Montana.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This simple home was the beginning of a long journey for the iconic Western film star.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

The facade of this relic from the Klondike gold rush is decorated with over 8,800 pieces of driftwood.

A historic freight system that found the true gold rush is in tourism.

A classic gold rush hotel can be expected to pick up some ghosts along the way, and the Golden North is no exception.

A miniature Corsican village built out of pebbles.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

An adorably sweet display of sculpted Precious Moments figurines.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.