The Caotan Dunes are an 8.1 km long coastal desert known as the Sahara of Taiwan. It is one of the popular check-in attractions on social media platforms, where young people often come to take photographs resembling foreign landscapes. Strong northeast monsoons and southern winds pile up drifting sands from the land to form dunes, stretching from Laojieshixiu Creek in Daoyuan District in the north to Dahuquxih Creek in Guanyin District in the south. These dunes represent the widest and most intact dune terrain along Taiwan's coasts.