Wallsee-SindelburgWallsee-Sindelburg is a town in the district of Amstetten in Lower Austria in Austria.WWW wallsee-sindelburg.gv.atGeographyWallsee-Sindelburg lies in the northwest part of the Mostviertel in Lower Austria, south of the West autobahn on the Danube River. About 26 percent of the municipality is forested.