With over 1,000 acres of public grounds, and a variety of natural features and arts-themed attractions like the de Young Museum and the Japanese Tea Garden, Golden Gate Park is an adventure in itself. Come for a bike ride and picnic, or bring your gear and take part in any of the sports played there daily. The best time to visit is during the week, as you'll have more of it to yourself, and you'll want to plan ahead and map a route, as it can be easy to get overwhelmed.