Ostmarka National Park

Ostmarka National Park is a forested national park southeast of Oslo, Norway, established on November 10, 2023 and spanning the municipalities of Oslo, Lorenskog, Raelingen, Nordre Follo and Enebakk. Covering about 71 square kilometers in total, including a roughly 54 square kilometer national park core and a 17 square kilometer outdoor recreation area, it protects pockets of old-growth forest and several endangered species close to Norway's capital, including the long, narrow lake Mosjoen, and is one of the few large national parks located immediately outside a national capital.