The Qigu and Annan areas on the west side of Tainan City, which used to be the inland sea of the Taijiang, have now receded, leaving behind many sandbars, wetlands, and lagoons, creating a rich ecology and landscape. It is a place for tourists to explore in-depth. From a historical perspective, ride from Anping, Tainan to the estuary of Luermen River, and experience how the Koxinga used the tide to enter Luermen Port Road in the 17th century to drive away the Dutch. And visit the Beishanwei Mazu Temple,LuermenTianhou Temple and the Luerhmen Mazu Temple. In addition to paying homage, by understanding the stories of the two Luermen traditional temples, we can also understand the historical memory left here after the silting of the port road and the diversion of Zengwen River after flooding. From a geographical point of view, you can follow the trails between lagoons and wetlands to reach the extreme west point of Taiwan. In addition to the endless dunes on the Dingtoue Sandbar, there is also a Guosheng Lighthouse next to it. This is the westernmost point of Taiwan's main island. The lighthouse is also a must-see attraction while cycling around the island. In addition, in terms of ecology, the wetland from the extreme west point of Taiwan to the south to the estuary of the Zengwen River is the habitat of the black-faced spoonbill, which is a protected animal in Taiwan. Besides the black-faced spoonbill, the wetlands are rich in ecology and food, which are loved by migratory birds, so this is an excellent place for bird watching. Not to mention that there are unique landscapes formed by mangroves such as the Sicao Green Tunnel, which are well worth exploring one by one through your bicycle travel.