Saturn Tower behind a sheltered walkway of the UN complex, Donaucity, Vienna, Austria, Europe

architecture austria austrian behind building buildings capital capitals cities city city scape city scapes cityscape cityscapes complex day daylight daytime donaucity during europe european exterior exteriors major metropolis modern nobody of outdoor pathway pathways photo photos roof roofed roofs saturn scape scapes sheltered shot shots the tower town towns un urban vienna view views walkway way ways