I can suggest some, not in CA, but in SEA.
In Phnom Penh, Cambodia, take a ride to Phnom Tamao Wildlife Rescue Centre. If it's still largely looked after by WildAid, then it'll still be good. 2-3 years ago when I was there, it was amazing - so many of Asia's endangered animals there and the habitat must be good cos the animals were breeding well. Animals are released whenever possible, really. It's 1 hour on highway 2 south of Phnom Penh and there's a long sandy track in to the entrance.
Still in Cambodia, if you ever decide to do irrawaddy dolphin watching in Kratie, PLEASE make the boatman stop the engines 100m from where the dolphins are, when approaching AND leaving the site. Unfortunately, this rule is not enforced by any of the "official" authorities there so please be the enforcements yourself. Otherwise the boats just keep chasing and harassing the dolphins to please their guests for the tips (boat tickets are sold at a counter, so the boatmen don't actually get cash from passengers)
Bokor Hill makes for a great short off-road ride up. Easy but nice. Conservation here is also looked after by WildAid.
Please follow the designated paths when visiting national parks and nature reserves. Don't believe organisations that tout themselves as eco-tourist friendly whilst still going on the unbeaten track. There is at least 1 I know who takes people rock-climbing in the habitat of the world's most endangered primate.
Do NOT drink the 'potent' wines brewed with wildlife or consume the wildlife fare. This is a country that still eats dogs regularly, so you can imagine the state of its wildlife, for whatever that's left.
Please do NOT patronise begging elephants, elephant painting shows or elephant rides.
In Thailand, elephants are tried in what is known as a crush, where the elephant is placed into a small wooden cage, beaten, jabbed, starved till they give up. Many elephants are drugged and overworked. The seats on the elephants' backs actually cause a strain esp. if they do not get a rest and the seats are not removed.
An elephant needs 250kg food a day and in the wild forage for 18 hours. It's never going to be enough for a working elephant.
When in Chiangmai, say for the Chiangmai Bike Week?, go to Elephant Nature Foundation. It's about 1 hour out from the city, up a hill with the valley on one side. There's an office in the city. Elephant Nature Foundation
. This is where elephants are not chained up, do not perform tricks, no bullhooks are used on them. They just frolic around as they are. This is also a place on the forefront of positive training as opposed to negative training.
There's also a similar sanctuary new Ayuthaya. Elephant Sanctuary - Boon Lott's Elephant Sanctuary in Thailand - BLES