Kayaking the bay is a great way to see the sights and get a sense of how much this body of water is a part of the city itself. The calm waters near the Bay Bridge are perfect for a beginning kayaker, but more adventurous types can head towards the Golden Gate where waters are a bit more turbulent. Rentals are available from several companies, both in the city and in places like Sausalito and Tiburon, and many offer guided tours and moonlit trips.