All of the museums at El Pueblo de Los Ángeles are free to enter.
The site is just 100 meters from Union Station.
Parking costs $15 if you can't find a spot nearby.
A few nearby places worth checking next.
I have been using it now for 3 months and it saves me so much research. Reduces the need to call and double check every time.
How did I not know these places existed?! Atly's scoring is a lifesaver, now I can finally find THE spot without wasting time Googling my life away.