< ">Norway comprises the western part of Scandinavia in Northern Europe. The rugged coastline, broken by huge fjords and thousands of islands, stretches 25,000 kilometres (16,000 mi) and 83,000 kilometres (52,000 mi) including fjords and islands. Norway shares a 1,619-kilometre (1,006 mi) land border with Sweden, 727 kilometres (452 mi) with Finland and 196 kilometres (122 mi) with Russia at the east. To the north, west and south, Norway is bordered by the Barents Sea, the Norwegian Sea, the North Sea and Skagerrak. Norwegian lowland landscape near the Gaulosen branch of Trondheimsfjord Reine in Lofoten, Northern Norway At 385,252 square kilometres (148,747 sq mi) (including Svalbard and Jan Mayen), (and 323,802 square kilometres (125,021 sq mi) without) much of the country is dominated by mountainous or high terrain, with a great variety of natural features caused by prehistoric glaciers and varied topography. The most noticeable of these are the fjords: deep grooves cut into the land flooded by the sea following the end of the Ice Age. The longest is Sognefjorden at 204 kilometres (127 mi). Sognefjorden is the world's second deepest fjord, and the world's longest. Hornindalsvatnet is the deepest lake in all Europe. Frozen ground all year can be found in the higher mountain areas and in the interior of Finnmark county. Numerous glaciers are found in Norway.