Sand Mountain Introduction: Some of the fine yellow sand on the dunes here are like solidified waves, some are like the Great Wall, and some are like islands, dotted with reeds, camel thorns, sand thorns, sand willows, Populus euphratica and other plants add a little greenery to the golden sand hills. Watching the morning sun and sunset in the depths of the sand mountain has a special flavor and interest. In addition, there are activities such as camel riding, surfing, sand boarding, sand mountain climbing, and sand sculpture viewing.