The drought in California has brought about a number of things, from exposing part of Mormon Island, an old mining town that has partially emerged from Folsom Lake (news coverage clip; aerial view of a re-emerged bridge with overly dramatic music; a tour of the exposed ruins), to being good news for gold prospectors. But if there's too much of a crowd in the Sierra Nevada foothills, you can always dig for gold in New York City (alt: YouTube), in the cracks of Midtown's Diamond District with Raffi Stepanian.
Looking for a new outdoor hobby? There's always recreational gold prospecting. If you live in Washington State, check out Bedrock Prospectors. If not, no worries, there's gold all over the United States and Australia. Probably elsewhere too, it's widely distributed. You can really get into it, but some practitioners say you probably won't make money at it. [more inside]