Sea lions resting on Pier 39, San Francisco, California, United States of America, North America

travel destination photography horizontal colour image outdoors north america united states of america american culture day pier pier 39 san francisco california sea lion resting california sea lion zalophus californianus side view full length large group of animals wildlife animal themes togetherness abundance wood material incidental people usa us united states united states of america north america american north american colour image colour color image color outdoor outside tourist destination travel background people people in the background group typically american american culture traditional culture tradition traditional traditionally american