You will likely need to be flexible with planning as Covid has the status of things such a dining and the opening of individual attractions in flux. If you like to explore by car, the 17 Mile drive is a toll road that takes you along some of the prettiest real-estate in California, especially if you like golf. You are also on the northern gateway to the Big Sur coastline, fly it or drive it, either way it is pretty. Oceano Airport was mentioned, alternately- 30 minutes north is KHAF, there is parking at the south end with a walk into Princeton, a pretty fishing harbor, The Half Moon Bay Brewing company is (in Princeton) right there and they are set up for outdoor dining. Driving north of Santa Cruz there are numerous secluded beaches off of the highway. Keep in mind NorCal summers can be chilly, the ocean, a giant "cold sink" hovers around 55 degrees, the winds are usually onshore, and fog can dominate the weather. It adds up to being sometimes chilly, oftentimes IFR. Also as Northern California is still under various restrictions so no sports, kids activities, shopping malls, etc, it all means that the coastline and trails are MUCH more crowded with families getting out and doing the only things they are allowed to do, and desperately trying to keep their kids entertained. Good luck, its a great area to visit, but the timing will present you with some unique challenges...