the tenderloin district is a cultural gem full of beauty and splendor that you must take in for yourself. just kidding but really the best thing about the city is just cruising around and seeing everything, its only like 7 miles across you can cover ground easy just by walking even. and yeah theres a zoo its got a badass gorilla pit with a bunch of huge ones. no forests per se but golden gate park is huge (be careful at night) you know just check the usual shit, chinatown, ocean beach, golden gate bridge, haight ashbury, lombard street, the piers, alcatraz is a cool litle day trip if the weather is nice you know all that tourist crap youve heard about