Tsengwen Reservoir, the largest man-made lake on Taiwan, is located on the upper reaches of the Tsengwen River, 56 kilometers northeast of Tainan city. This spectacular project, started in 1965 and completed in 1973, has multiple benefits. It has become one of the island's most popular scenic spots with completion of a highway along the dam, hotels and other recreational facilities.
曾文水庫是國內最大的人工湖，位於台南縣楠西鄉，工程浩大壯觀，具有多元化效益，於民國五十四年時開工，六十二年完工，後又陸續增建環湖公路、賓館等各項觀光遊樂設施，現已成為一個遊覽勝地。