In San Bernadino the San Bernardino Nation Forest & Mountains, Santa Ana River Trail, Black Mountain Fire Lookout all would be a great places for landscape Photography.
For Glendale: The Americana at the Brand is beautiful:XXXXX Ste. 330, Glendale, CA 91210 , Forest Lawn Memorial Park, Mount Gleason, Glendale Galleria, and Glendale Centre Theater.
In Glendale you may find more street Photography where as in In San Bernadino it may be more lanscape Photography.
I hope these help you find the perfect areas to shoot your Pictures. Joan
Riverside Ca has 52 parks that cover over 2700 acres of land.
There is the Botanical Gardens which would be great.
Citrus State Historical Park with the old architecture would be good.
Riverside Downtown Farmers Market on,
Main Street between 5th and 6th Streets
http://shermanindianmuseum.org/ This is an Indian Museum.
I hope this is a good starting point for You.