The term 'WHERE THE PO RISES' is solved by the four letter word ALPS. The ALPS are a mountain range located in Europe, stretching from Austria and Slovenia in the east, through Italy, Switzerland, Liechtenstein and Germany to France in the west. They are one of the most iconic mountain ranges in the world, and are home to some of the highest peaks in Europe. The Po River, which is the longest river in Italy, rises in the ALPS.