What happens in an enormous forest in the heart of Los Angeles County? Landmark 717 details the tug-of-war between civilization and Mother Nature in Angeles National Forest.What happens in an enormous forest in the heart of Los Angeles County? Landmark 717 details the tug-of-war between civilization and Mother Nature in Angeles National Forest.What happens in an enormous forest in the heart of Los Angeles County? Landmark 717 details the tug-of-war between civilization and Mother Nature in Angeles National Forest.