Over 315,000 preserved amphibians and reptiles in jars.

A century and a half of research in the sciences and natural history, still going strong.

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

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

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

Haunting and beautiful trees, doomed to die.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

Art Deco stylings conceal the true nature of this bridge.

A replica of the first public theater built in California.

A mesmerizing disco ball-like sculpture along the Sacramento River Walk.

The California capital city once stood 10 feet lower than it does today.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

A ruined hotel with an unlucky history and an eerie present.

I Street Bridge is the heaviest swinging center bridge in the United States.