03.03.2008, Vianden, Luxembourg - The cavern hall (machine hall) with new machine units (turbines). The machine hall is located in an underground tunnel system. The PSW Vianden with its capacity of 1,100 megawatts (MW) is Europe's biggest pumped storage hydroelectric power plant. It is used to store energy. This way at peak consumption additional current can be easily produced. 0CE080303D007CAROE.JPG - N O T for S A L E in G E R M A N Y / G E R M A N Y OUT [MODEL RELEASE: NO, PROPERTY RELEASE: NO (c) caro images / Christoph Eckelt, http://www.caro-images.com, [email protected] - In case of using the picture for any non-editorial purpose, please contact the agency - the picture is subject to royalty!]