In the Kvarken archipelago, you can clearly see traces of the last ice age. Currently, the land uplift in the area is approximately 8 mm per year, which means that new land is rising above the water surface every year. The nature in the Kvarken archipelago therefore continuously changes over time and leaves traces on both plant and animal life in the area.

A typical and characteristic feature of the landscape and nature in Kvarken are coastal lagoons, so-called flads and gloes. As a result of the land uplift, shallow bays are cut off from the sea to eventually form lakes. Another distinguishing feature of the area is the primary succession forest. The forest and vegetation, which is the first to grow on the uplifting land, looks different depending on how long the land has been above the water surface.

A substantial part of the world heritage area belongs to the Natura 2000 network, which aims to protect and conserve important habitats and species in the EU. Detailed descriptions of all Natura 2000 habitats can be found here. The Kvarken archipelago is also one of the Baltic Sea Protected Areas (HELCOM).