Marsworth Reservoir is a large water body located in Buckinghamshire, England. It was constructed in the 19th century to supply water to the Grand Union Canal. The reservoir is surrounded by scenic countryside and is a popular spot for walking, birdwatching, and enjoying nature. The reservoir is part of a larger network of water management systems in the area. It supports various wildlife, including numerous bird species, making it an important habitat. Visitors can also find walking paths and picnic areas, making it a great destination for outdoor activities and relaxation.