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

The road plays 30 seconds of the Marine’s Hymn when driving over the grooved pavement.

See four top-secret US spy aircraft of the Cold War era, including the legendary SR-71 Blackbird and the A-12 Oxcart.

This park is home to California's first oil boomtown, with structures that have stood for more than a century.

According to legend it was a nap taken under this tree that kicked off the California Gold Rush.