The Atlantic Ocean Tunnel (Norwegian: Atlanterhavstunnelen) is an undersea tunnel that is part of Norwegian County Road 64 which connects Kristiansund Municipality to Averøy Municipality in Møre og Romsdal county, Norway.

Construction began in 2006, and the tunnel opened on 19 December 2009, later than initially estimated.

Problems with water leaks caused delays and cost overruns.

[1][2] The name of the tunnel comes from its connection of two islands located at the open Atlantic Ocean, and serves as an extension of Atlanterhavsveien (Atlantic Ocean road), a popular tourist attraction.

Atlanterhavsveien road runs over a series of small islands with views of sea, fjord, and mountains, connecting Averøya to the mainland near the town of Molde.