On the state's coastline on the Baltic Sea are many holiday resorts and much unspoilt nature, including the islands of Rügen, Usedom, and others, as well as the Mecklenburg Lake District, making the state one of Germany's leading tourist destinations. Three of Germany's fourteen national parks, as well as several hundred nature conservation areas, are in the state. The University of Rostock, founded in 1419, and the University of Greifswald, established in 1456, are among the oldest universities in Europe. In 2007, the 33rd G8 summit took place at the Grand Hotel Heiligendamm on the Mecklenburg Baltic coast.