The easternmost three-thousanders in the Alps are in the Hafner Group in the east of the High Tauern (from west to east: Großer Hafner , Lanischhafner , Lanischeck , Großer or Malteiner Sonnblick , and Mittlerer Sonnblick ). The northernmost 3,000ers are in the northern chains of the High Tauern, Zillertal, Ötztal, and Stubai Alps (as well as the Parseierspitze in the Lechtal Alps). The southernmost 3,000ers are on the main chain of the Maritime Alps (Argentara Group), the Mercantour and the Pelat Group with about a dozen main peaks over above sea level. In the eastern Alps the southern boundary lies in the Bergamo Alps (3 main summits), of the Adamello-Presanella Group (about a dozen) and the Dolomites (about 50 peaks). So the ranges of the Alps that contain mountains over the 3,000 m mark comprise roughly two thirds of the area, the 3,000er zone in the Western Alps coming much closer to the edge of the Alpin region than in the Eastern Alps with their extensive system of foothills. The easternmost 3,000er is over from the Pannonian Alpine perimeter, the westernmost only about from the Rhone valley. A large part of this sensitive, high Alpine region is protected by conservation areas, but it also forms the touristic heart of the Alps.