This is a really interesting story about the secret web of tunnels that run underneath Fresno, California's Chinatown, which date back to the city's days as a western railroad town:
Secret tunnels tell tale of gambling, prostitution. The tunnels were apparently once a thriving home to all sorts of illicit activities, like gambling and prostitution. Now, a group of archaelogists is using ground-penetrating radar to find evidence of secret passages branching from the neighbhorhood's long-abandoned basements. The project is headed by Chinatown Revitalization, a group working to preserve Fresno's Chinatown. It's pretty fascinating stuff.
