Home of what was the largest hydraulic mine in the world, producing gold and the first diamonds in the U.S.

Hidden inside a gift shop that doubles as a museum, this gargantuan yo-yo can only be operated by crane.

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

A trash dump made beautiful by nature's power.

Rising out of miles of farmland, these buttes are sometimes called the world's smallest mountain range.