Shimen Reservoir is a large water reservoir located in Taipei City, Taiwan. It was constructed in the 1970s to provide a reliable water supply for the surrounding areas. The reservoir is surrounded by scenic mountains and lush greenery, making it a popular spot for outdoor activities such as hiking and birdwatching. The reservoir has a capacity of approximately 100 million cubic meters of water, serving as a crucial resource for both domestic and agricultural use. Additionally, it plays a vital role in flood control and irrigation, helping to manage water resources in the region effectively.