Identified ... THANKS everyone!! I've edited my original post below to show the id's.
I've been looking through the picture folders on my laptop and came across these cacti photos I took when vacationing in San Diego, California. Wonder if anyone recognizes them?
1. Candelabra Tree (Euphorbia ingens)
Wacky Cactus, photo taken at Balboa Park, San Digeo 1/12/2015
2. Chollas (Cylindropuntia)
Spiny Cactus, photo taken at Point Loma area, San Diego 1/9/2015
3. Prickly Pears (Opuntia)
maybe O. phaeacantha? Photo taken at Balboa Park, San Diego 8/16/2013
4. Euphorbias (Euphorbia)
Opuntia? Photo taken at Balboa Park, San Diego 1/12/2015 and it's the only picture I have.