A building so large that it has its own weather.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The final remnant of the Arkansas zinc industry is this historically protected ghost town.

The only diamond mine in the world where you can keep what you find.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

A second generation sun-powered marvel lights up the night.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

A giant donut stands as a popular symbol of Los Angeles iconography.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

This private residence was the template for one of the most beloved television homes of all time.

The final resting place of a space program monolith.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

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

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

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

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