AEROE, DENMARK - 02 OCTOMBER 2010 -- Den fredede Vitsø mølle er opført i 1838 til at afvande Vitsø fjord. Møllen er den eneste i Danmark, som har bevaret archimediske snegle af træ, der "skruede" vandet op. PHOTO: ERIK LUNTANG / INSPIRIT Photo...Vitsoe Cove pump mill is from 1838 and lies between the drainage channels. This type of windmill is called a soil Dutchman". The mill is one of Denmark's first windmills with a mechanism known as Archimedes' screw: a spiral screw inside a tight-fitting hollow pipe. As the screw turns, the thread lifts water from the bottom and out the top of the pipe. PHOTO: ERIK LUNTANG / INSPIRIT Photo.