There are so many ways to create a perfect day in San Diego. Whether you are traveling alone or with friends and family, there's plenty to fill your day. Balboa Park has dozens of museums and gardens to explore. Check out the world famous San Diego Zoo, although you will probably need a full day just to see it. If the beach is more your thing, spend a day at the ocean or walk along the Boardwalk. It's easy to have a perfect day in paradise.