Hurumlandet

[2] The bedrock is very varied with the remains of an ancient volcano in the central and Ersvika and a lot of red granite in key areas.

In the south there are also some limestone and a raised section of Ordovician, and started rock and quartzite parties.

Hurum country has a disproportionate number of protected natural areas, due to the very rich and diverse biology on the peninsula.

Hurum country has coastal coniferous forest and a rich fauna, particularly on the island of Tofteholmen.

[3] In the south there are eight nature reserves - Holtnesdalen (deciduous forests), Solfjellåsene (limestone habitats), Haraldsfjellet (limestone habitats), Sandbukta-Østnestangen (vegetation), Ersvikskjær (bird), Tofteskogen (forest), Ranvikholmen (plant) and Tofteholmen (plant).