The Marina district is considered a relatively posh locale. This neighborhood is highlighted by the Grand Palace of Fine Arts, pleasantly decadent in its veil of Greco-Romanesque elegance. The Presidio, formerly built with military functionality in mind, is now a welcoming natural expanse of lush green preserve that hosts frequent picnics, beaches, and exhilarating hiking trails for the adventurous nature-lover, or even the excessively pale-skinned visitor in need of a relaxing tan. The third precious pearl would be the Exploratorium that houses mind-bending exhibits portraying cutting-edge technology, science, and arts. All you aspiring young scientists and inventors are bound to get a heavy dose of inspiration while exploring at the Exploratorium.