Suomenselkä

Roughly 500 kilometres (310 mi) long and 30–50 kilometres (19–31 mi) wide, it is marked by an ensemble of northeast–southwest oriented moraines parallel to the Bothnian coastline.

Geographically, the area is relatively flat, with highest altitude variations being 20 m. Because of the low relief, there are bifurcation lakes.

The landscape is marked by moraines, eskers, bogss and forests and is difficult to cultivate or settle in.

Because it contains some of the few remaining patches of old-growth forest in southern Finland, it is one of the few remaining habitats for Finnish Forest Reindeer (Rangifer tarandus fennica).

Suomenselkä is often called Lapin sormi ("a finger of Lapland"), because it extends Lapland's high snowfall and poor plant growth far south into Finland.