Concrete strongholds stand guard over the Golden Gate.

Four hundred granite steps were built into this massive rock by the National Park Service.

The world's second largest single-dish radio telescope, once used to contact E.T.

A museum devoted entirely to the rattlesnakes and snake-related art.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

"We Seceded Where Others Failed."

A starship has landed in Texas, a welcome break for weary travelers from a drab stretch of I-35.

Mysterious glowing orbs float through the desert night.

Stairs often replace streets on the steep slopes of this old mining town.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A hugely vast Irish landscape of barren rock that stretches for miles.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

Contemporary art inspired by natural history and science drawing on ancient techniques in a modern world.

Where the rich wintered in Pasadena.

A landmark for a trailblazer for female architects and the designer of one of the most famous and opulent buildings in California.

One of Hollywood’s favorite government buildings.

Two groundbreaking brothers from Pasadena.