<Boulders Beach>
・ https://pixabay.com/photos/penguins-jackass-beach-sand-275966/#content
・ https://pixabay.com/photos/penguin-jackass-leader-boss-lonely-1719608/#content
・ https://pixabay.com/photos/south-africa-penguins-penguin-few-3529723/#contenthttps://unsplash.com/photos/PwwVG2hdIic
・ https://unsplash.com/photos/PwwVG2hdIic
<Table Moutain>
・ https://pixabay.com/photos/south-africa-cape-town-2267795/#content
・ https://pixabay.com/photos/table-mountain-devil-s-peak-3607634/#content
・ https://pixabay.com/photos/barcelona-cable-car-vacation-2422372/#content
<Kruger National Park>
・ https://pixabay.com/photos/landscape-big-green-heaven-blue-2233373/#content
・ https://pixabay.com/photos/elephant-animal-africa-2668246/#content
・ https://pixabay.com/photos/wildlife-lion-kruger-national-park-4097847/#content
・ https://pixabay.com/photos/hunting-african-africa-safari-1364423/#content
・ https://pixabay.com/photos/giraffe-africa-south-africa-2352281/#content
・ https://pixabay.com/photos/south-africa-sunrise-landscape-park-2847776/#content
Reference material
・ http://south-africa.jp/meetsouthafrica_lists/2746/
・ https://www.tour.ne.jp/matome/articles/264/