Ride on a fully-restored Nike nuclear-tipped missile elevator from the Cold War.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

Across Ring Mountain is a vast collection of Native American petroglyphs unique to the region.

A modest reminder of treacherous waters at the Golden Gate.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

Enormous crabs, bioluminescent jellies, and other amazing creatures from the ocean’s depths—some of which are in an aquarium for the first time ever.

After the nearby mercury mine shut down, this town was abandoned and declared a Superfund site.

A downtown park built on top of unclaimed graves.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

A collection of over 15,000 zines works to preserve DIY publishing culture.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

For almost 100 years, this site of peace and spirituality has existed on the California coast.

Historic funicular railway, believed to be the shortest railroad in the world.

This graveyard is the eternal home of many brave pioneers who settled the Great Northwest.

One of the most comprehensive collections of historic Native American culture in the country reframes artifacts as artwork.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

A gift from Scotland to the United States in memory of the 270 lives lost when Pan Am Flight 103 exploded over Lockerbie due to a terrorist bombing.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Perhaps the most scandalous statue of America's first president.

The only Leonardo Da Vinci painting in the Western Hemisphere.