несколько ресурсов с качественными фото:
https://unsplash.com/search/photos/california
https://digitalsynopsis.com/design/beautiful-photos-of-california/
http://www.orangesmile.com/travelguide/california-state/photo-gallery.htm
https://www.thecrazytourist.com/the-most-beautiful-spots-in-california/