Sand Parangkusumo Gumug located in Yogyakarta. Gumug sand are mounds of sand that contains the material along the beach until Parangtritis-Parangkusumo Opak River estuary. This is a phenomenally unique because only one in Southeast Asia we can see the desert like the Sahara desert. Although sand dunes are not as wide as the Sahara, but made as if we were in the Sahara Desert.