The Keukenhofmolen is a relatively modern polder mill located inside the Keukenhof gardens. The mill was originally built by P. Medendorm in 1892, to serve the 162 hecare Rozenburgerpolder in Slochteren. It was demolished in 1954, and re-built inside the Keukenhof in 1956. The Keukenhofmolen is now owned by the Keukenhof Foundation, and can be seen running every day during the spring. The mill is open to the public, and the opening hours are listed on the web site for the Keukenhof gardens.