SC is pretty barren in terms of nice spots. A lot of the more notable ones are pretty tough to skate.
Ken Wormhoudt park is a really great park near downtown SC that has a medium sized street section with just about everything you'd want, and 3 separate bowl sections including a mini and a kidney. This is the more popular park in town.
Derby park is a piece of skateboarding history. It's been remodeled in the last year, and now has a nice little curved quarter pipe in the shallow end, a pyramid with a parking block and a nice little nipple to boost off of in the deep end.
Jose ave park is a strange little thing. Has a lot of odd transition and some nice ledges around the perimeter. Fun for a small group, but if more than 6 people are skating here then it gets really crowded. This place can also be pretty sketchy, as it's right next to a low income apartment complex and the surrounding park is a haven for drug deals.
Scotts Valley park is a 15 minute drive up highway 17. It's a really nice park with everything you'd ever want. The center of the park is transition, with the perimeter being a flowy street section with manual pads, ledges and a flatbar. BRING YOUR HELMET TO THIS PARK. The cops HOUND this place. Scotts valley is a boring little mountain town and the cops patrol this place at least twice a day and they WILL ticket you on a first offense.
Santa Cruz high is a pretty nice little spot. In the back there's a stage that's the perfect height for a manny pad, some fucked up ledges, a 6 stair and 3 block. Come here after 4 on weekdays. The staff here is chill, I've never been kicked out.
This ledge on laurel is pretty notable. It's long and is right in the middle of a huge hill. Extra point for a grind into hill bomb.
Harbor high school in midtown is pretty dope. It's got a lot of nice benches to skate, several awesome hills for bombing and a large stage in the back. Unlike Santa Cruz high, the staff here roams around on golf carts and will kick you out. Best day to go is on a sunday.
https://www.youtube.com/watch?v=IWnL84wdxBoThis 8 stair in Aptos (known as the Scab 8, Scab used to be the skate shop directly in front of it) is pretty notable in the city, as it's pretty large and has a really nice runway. Located in the rio del mar shopping center in Aptos. Sometimes there are security guards that will boot you, but they dont patrol at night.