Woudagemaal steam boiler.
Steam boilers, valves and pipes of water pumping station.
The ir. D.F. Woudagemaal the largest still operational steam-powered pumping station in the world. It is used to pump excess water out of Friesland, a province in the north of the Netherlands.
ir. D.F. Woudagemaal has been listed on the UNESCO World Heritage Site list.