Urpola Nature Centre/Saimaa Geopark visitor centre is a refreshing and versatile destination near the centre of Mikkeli. It is housed in Mikkeli's oldest residential building, dating back to 1782, where an annually changing exhibition is held during the summer season. The nature centre also aims to complement environmental education in schools and kindergartens. In addition to the nature exhibition, the centre features an interactive wall made with technology from OiOi Collective Oy. The wall allows visitors to read about the birth of Lake Saimaa, play an ice age-themed reaction game or bring Terhi Kastehelmi's imaginative mural to life.