The geology of the RGP area connects in many ways to human prehistory and the present day. The area’s first inhabitants arrived around 6,000 years ago, attracted to the land that emerged as the sea withdrew as the land rose, freed from the weight of the continental ice sheet. Ever since then the area has been a site of human settlement and recreational use. Humans have left on the area many traces, which still tell their story in the landscape of the RGP area. The area’s internationally best known prehistoric site is the prehistoric settlement of Nimisjärvi, for which a specific ceramic type, the Säräisniemi ceramics, has been named.
In the area are located a total of 13 cultural-historical environments classified as nationally significant, as well as 100 cultural-historical sites classified as regionally significant. These sites include prehistoric settlements, old buildings, old farms and farmyards, traditional agricultural landscapes, hunting traps, tar-burning pits and power plants. The area also has sites designated as national monuments. Moreover, also in the area are a number of nationally and locally significant traditional rural biotopes and one traditional biotope classified as nationally significant.