Sanyegong River

Sanyegong River is a waterway running through Yongkang and Rende districts in Tainan with concrete embankments and numerous bridges throughout. The course of the river has been shaped by this built infrastructure that manages water flow across urban areas.

During the Daoguang period of the Qing Dynasty, heavy rainfall caused sediment to accumulate in the Taijiang Inner Sea. This event shifted the river's flow direction southward and reshaped the local geography.

The river takes its name from the Sanjia Sanye Temple, built in the 18th century to honor three Wangye spirits. This religious connection still shapes how locals view the waterway and the broader landscape around it.

The Rende Detention Basin near Chung Hwa University of Medical Technology provides good access for activities along the river levees. The levees are suitable for cycling and relatively easy to reach from nearby residential areas.

The river banks host populations of invasive green iguanas that arrived after Taiwan eased restrictions on keeping these reptiles as pets in 2001. This unexpected wildlife presence shows how animals adapt to urban waterways.