The Site is a representative example of a natural raised bog complex, characteristic of the boreal biogeographical region. The Northern Bogs include four large raised bogs: Kodu-Kapzemes mire, Ollu mire, Limsanu mire and Pirtsmeza mire. The Site also comprises hummocks and hollow complexes with labyrinths of bog pools. The forests around the bogs are of various types, with mixed forests dominating. The wetland plays a significant role in regulating the local microclimate as well as recharging groundwater and supports a variety of life forms. Furthermore, the Northern Bogs are of cultural value; they served as historical winter roads, as well as a refuge during the Second World War. They are now used for recreation, tourism and research. Parts of the Kodu-Kapzemes and Ollu mires are located within the territory of Estonia and are included in the Sookuninga Ramsar Site (Site no.1748).