Where to Find SoCal''s Most Fascinating Mining ... KCET
The "harvest" that followed created California''s largest open pit mine, which is still an active worksite operated by Rio Tinto. Among the displays outside the Borax Visitor Center are original ore carts, headframes, and a 190ton truck tire from a 739 Cat truck. Inside, you''ll get more of the history and the industrial legacy of borax ...