Møn (Danish pronunciation: [ˈmøˀn]) is an island in south-eastern Denmark. Until 1 January 2007, it was a municipality in its own right but it is now part of the municipality of Vordingborg, after merging with the former municipalities of Langebæk, Præstø, and Vordingborg. This has created a municipality with an area of 615 kmÂ² (237 sq mi) and a total population of 46,307 (2005). It belongs to the Region Sjælland ("Zealand Region"). Møn is one of Denmark's most popular destinations for tourists with its white chalk cliffs, countryside, sandy beaches and the market town of Stege. In June 2017, UNESCO designated Møn as Denmark's first biosphere reserve, consisting of "a series of islands and islets in the southern Baltic Sea, over approximately 45,118 hectares (131,890 acres). Its landscapes include woodlands, grasslands, meadows, wetlands, coastal areas, ponds and steep hills."