FRESNO, Calif. -- Is there an elaborate network of tunnels beneath Fresno's streets?
That's one theory to explain a series of spaces and passageways beneath buildings in historic Chinatown. While some believe they're just forgotten basements, others contend that a series of tunnels beneath the city used to serve as escape routes for often-targeted Chinese immigrants.
Check out the video above to see what else could have gone on in the tunnels.
Hidden Fresno is an exclusive ABC30 series uncovering secrets of Fresno. Click here to watch more stories.