L.A. TV icon Huell Howser -- best known for hosting the wildly popular travel show "California's Gold" on KCET -- has passed away at age 67.
A rep for KCET tells TMZ, Howser died in his Palm Springs home early Monday morning of natural causes ... details surrounding his death have not been released.
He hosted his Cali travel show for 18 seasons -- and only recently retired in November after completing over 440 episodes.
Fun fact: Howser also appeared on two episodes of "The Simpsons" ... Matt Groening was a huge fan.
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