(250728) -- SIWA, July 28, 2025 (Xinhua) -- An aerial drone photo taken on July 28, 2025 shows tourists floating on a salt lake at Siwa Oasis in Matrouh Governorate, Egypt. Siwa Oasis lies in Egypt's western desert, some 800 kilometers from Cairo. There are many natural salt lakes on which people can float with no effort due to high salt concentration. (Xinhua/Ahmed Gomaa)