Spread out on the southwest corner of the sunny Presidio, the mile-long Baker Beach is known for its fantastic views of the Golden Gate Bridge and the Marin headlands. The northern end of the beach tends to be the cruisy section, and also where the nude bathers camp out; on warmer days it will be crowded with sun worshipers. Hikers can pick up the Coastal Trail on the cliffside, and those who are eagle-eyed should be able to spot porpoises frolicking in the surf. Be aware that the water is cold and currents can be unpredictable, so young children should avoid swimming.