turtles on floating tree trunks seen in the pond in front of the palace of fine arts in san francisco california

activity aquatic architectural arts attraction beauty biodiversity california city cityscape conservation cultural destination ecosystem fauna feature fine floating francisco greenery habitat heritage historical iconic landmark leisure life nature oasis outdoor palace park peaceful photography picturesque pond public reflection reptiles san scenic serene sightseeing site space spot tourist tranquility travel tree trunks turtles urban view water wildlife