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. The eastern end of the tunnel is on Kirkelandet island in the town of Kristiansund and the western end of the tunnel is on the island of Averøya, just west of the village of Sveggen. The 5,727-metre (18,789 ft) long tunnel runs beneath the Bremsnesfjorden, reaching a depth of 250 metres (820 ft), making it one of the deepest undersea tunnels in the world. Construction began in 2006 and the tunnel opened on 19 December 2009, later than initially estimated.