Amanchu!, Yuru Camp△ Recommendations
slice of life with young school grils' extra curicular activities involving traveling
Together they are the most peaceful animes I know
Both are easy going slice of life shows. One focuses on diving while the other focuses on camping. They're both a bit slow moving, but that isn't a ding against either of them. It helps emphasizes the relaxing nature of the shows and forces you to really take in the beauty of the nature surrounding these girls and their activities.