Slightly more than one half of Hungary's landscape consists of flat to rolling plains of the Pannonian Basin: the most important plain regions include the Little Hungarian Plain in the west, and the Great Hungarian Plain in the southeast. The highest elevation above sea level on the latter is only 183 metres (600 ft). Transdanubia is a primarily hilly region with a terrain varied by low mountains.
These include the very eastern stretch of the Alps, Alpokalja, in the west of the country, the Transdanubian Mountains, in the central region of Transdanubia, and the Mecsek Mountains and Villány Mountains in the south. The highest point of the area is the Írott-kő in the Alps, at 882 metres (2,894 ft). The highest mountains of the country are located in the Carpathians: these lie in the North Hungarian Mountains, in a wide band along the Slovakian border (highest point: the Kékes at 1,014 m/3,327 ft). Hungary is divided in two by its main waterway, the Danube (Duna); other large rivers include the Tisza and Dráva, while Transdanubia contains Lake Balaton, a major body of water. The largest thermal lake in the world, Lake Hévíz (Hévíz Spa), is located in Hungary. The second largest lake in the Pannonian Basin is the artificial Lake Tisza (Tisza-tó). Phytogeographically, Hungary belongs to the Central European province of the Circumboreal Region within the Boreal Kingdom. According to the WWF, the territory of Hungary belongs to the ecoregion of Pannonian mixed forests. Hungary has 10 national parks, 145 minor nature reserves and 35 landscape protection areas (Source: Wikipedia).