San Diego
Sea World, San Diego Zoo,and gas lamps
Two days are enough if you're just going to these three places. The gaslamp is prettier at night
Los Angeles
Six Flags magic mountain, Universal Studio, Disneyland, and Santa monica
You need more than three days if you are going to all these places
Yosemite International park
You only need one day at Yosemite international park but first you have to make sure that the waterfalls aren't dry, even so, the park is so beautiful