Lantan Reservoir, also known as Orchid Lake, is an artificial lake located in the central region of Chiayi County, Taiwan. Surrounded by rolling hills and lush vegetation, it serves as an important source of water for irrigation, domestic use, and hydroelectric power generation in the region. The reservoir was completed in 1919 during Japanese rule and is remarkable for its scenic beauty and tranquil atmosphere. Meandering pathways and delightful pavilions around the lake make it a popular destination for outdoor enthusiasts and picnickers. In addition to its utilitarian functions, Lantan Reservoir is also a habitat for a diverse array of bird species, making it a favored spot for birdwatchers. Visitors can enjoy boating on the calm waters or explore nearby attractions such as the Chiayi Botanical Garden, Lantan Dam, and the Chiayi Tower. The area is also famous for its spectacular sunset views, where the play of colors over the serene water creates breathtaking vistas, and the lake beautifully reflects the sky above.