Salpausselkä in the context of "Terminal moraine"

Porvoonjoki (Porvoo River, Swedish: Borgå å) is a small river in Finland. The medieval town of Porvoo is situated in the river delta. It is the main river of the Porvoonjoki drainage system, the sources of which are located on the southern slopes of Salpausselkä in Kärkölä, Hollola and Lahti. The river flows through Orimattila, Pukkila, Askola and Porvoo into the Gulf of Finland. The agricultural landscape of the Porvoo River with its ancient settlements, villages and manors together with the old town of Porvoo is part of the national landscapes of Finland.

Porvoonjoki was originally a trade route for the Tavastians and its original name may have been Kukinjoki. The name would have its roots in the Friesian nomenclature of kugg, which would correspond to other similar trading places on the coast.

Päijät-Häme (Finnish pronunciation: [ˈpæi̯j(ː)æt̪ˌhæme̞(ʔ)]; Swedish: Päijänne-Tavastland) is a region in Southern Finland south of the lake Päijänne. It borders the regions of Uusimaa, Kanta-Häme, Pirkanmaa, Central Finland, South Savo and Kymenlaakso. The biggest city in the region is Lahti.

Päijät-Häme boasts a landscape shaped by two key features. Finland's second-largest, Lake Päijänne, dominates the region, offering a vast freshwater expanse and a vital transportation route. The Salpausselkä ridge, a glacial remnant, adds a touch of elevation and scenic variation. Beyond these, Päijät-Häme features extensive coniferous forests. Rolling hills provide scenic views, while numerous smaller lakes and rivers create a network of waterways.