This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

Where the writer penned his famous story about a jumping frog.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

This massive swimming pool is the high tech home to the human-powered submarine races.

Twenty churches beautifully painted by 19th-century Czech and German immigrants in Texas.

A tall smoke stack and boarded-up buildings are all that's left of the pioneering plant.

An emerald-green grotto just a short trip from Austin.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

The place of worship for Zoroastrians, Mumbai's Parsi fire temples use fire and ash for purification.

The unusual burial monument of Arizona's first governor.

An artsy hidden staircase leads to breathtaking views of San Francisco.