The Dolomites Mountain Range, belonging to the Italian Alps, has 80% of its land area in the Province of Belluno in northern Italy. Its name comes from Deodat of Dolomieu, a French geologist who discovered the composition of the rocks in 1791. The highest mountain in the Marmolada massif is approximately 3342 meters high, but there are other peaks over 3,000 meters. In the region of the Dolomites, there are towns such as Cortina d'Ampezzo, Ortisei and Corvara. The Dolomites were declared a UNESCO World Heritage Site in 2009. In this region, the most spoken language is the Ladino language, a Rhaeto-Romance language that has developed due to the isolation of the mountain valleys, but they also speak Italian and there is a German speaking minority.