The River Lee Navigation is a waterway in England that runs through the counties of Essex and Hertfordshire. It stretches approximately 13 miles, connecting the River Lee to the River Thames. The navigation was constructed in the late 18th century to facilitate trade and transport goods, making it an important route for local industries. Today, the River Lee Navigation is popular for recreational activities such as boating, cycling, and walking. It features a series of locks and weirs, which help manage water levels and navigation. The surrounding areas are also home to diverse wildlife, making it a scenic destination for nature enthusiasts.