Stelvio National Park, the largest natural park in Italy, hosts the biggest variety of Alpine plant and animal species. Then there are the Adamello peaks, with their perennial snow, the Valtellina and the Valcamonica. The rivers reign in the valley: the Ticino, with its park, the Po, which is the longest river in Italy, the Adda and the Oglio. The great lakes, Garda and Como, are historical locations and prestigious retreat spots that have mansions nestled on their shores and hotels that welcome the international jet set. The waterways that were used in the past for transportation, are now used for sailing excursions with tourists who marvel at the gorgeous views.