The first declared National Monument in the United States.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

A bizarre house filled with an astounding array of collections.

San Francisco's newly reopened hands-on science museum.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A cemetery housing wild west legends in South Dakota.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

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

A beautiful geyser under environmental threat.

A fitting attraction for the corn capital of the world.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

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

The only arched bridge made of stone on the entire Mississippi River.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Every president in history is immortalized in bronze in downtown Rapid City.

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

One of America's first dinosaur parks gives a window into Depression-era paleontology.