Next the river passes How Hill nature reserve, which is open to the public. There are a number of nature trails, passing through sedge beds, marsh meadow and carr woodland. Access is on foot, or in an electric boat. The site includes Toad Hole Cottage, a small marshman's house which was refurbished in the 1980s, and is furnished to show what life was like in the 1880s. Visitors can also walk through the gardens, where there is a tea room, but the grade II listed How Hill House is an educational centre, and is not open to the public. How Hill staithe has a thatched boathouse, and the reeds which are cut for thatching are often stacked on the staithe to allow them to dry. Below How Hill the river makes a wide horseshoe bend, passing Neaves Drainage mill as it heads towards Ludham Bridge. The mill was build in 1870, but was becoming derelict in the 1970s. The wooden boat-shaped cap was replaced by an aluminium one in 2009, as the wood was rotten, and it lacks sails. Ludham Bridge drainage mill was built around 1877, but had lost its sails and fantail by 1934. During the Second World War it was used as a pillbox by the home guard. Just the brick tower remains, and it has a distinctive lean to one side. It was built to supplement the larger Beaumont's drainage mill to the south of Ludham Bridge, which was built between 1800 and 1802 when Ludham Marshes were enclosed. Both mills were assisted by a steam pumping engine, which was constructed closer to the bridge in the 1890s. Beaumont's mill became derelict in the 1940s and was demolished in the 1960s.