De Otter

De Otter is Amsterdam's last operational industrial wind-powered sawmill, a living monument from the 17th century that outperforms #8 De Valk in sheer mechanical authenticity, with its original sawing machinery still processing timber. This landmark draws over 45,000 visitors annually who witness its genuine 1625-era blade mechanism, which cuts logs 30% faster than the typical reconstructed mill. Unlike the museum-focused De Valk, De Otter earns its keep by producing over 200 cubic meters of sawn wood yearly, making it the only fully functional heritage sawmill in the Netherlands.