Whenever in the La Jolla area, I love to stop at the Torrey Pines Gliderport and watch the brave paragliders and hang gliders soar above the ocean and Black's Beach below, where sunbathers enjoy a different type of risk: sunburning their not so private parts.
At the Gliderport, there is a casual cafe and shop where you can grab some coffee or a snack or even a paragliding lesson. They offer tandem flights with an instructor as well. Tables out on the bluff are for customers only, so be sure to buy something if you come to watch.
The gliderport is located off of North Torrey Pines Road. (Take the Genesee exit off the I-5.)