The southern mainland section is much larger than the northern, and is dominated by the long Kintyre peninsula, the terminus of which lies only 13 miles (21 km) from Northern Ireland on the other side of the North Channel. The coast is complex, with the west coast in particular being heavily indented and containing numerous sea inlets, peninsulas and sub-peninsulas; of the latter, the major ones (north to south) are Appin, Ardchattan, Craignish, Tayvallich, Taynish, Knapdale and Kintyre, and the major loch inlets (north to south) are Loch Leven, Loch Creran, Loch Etive, Loch Feochan, Loch Melfort, Loch Craignish, Loch Crinan, Loch Sween, Loch Caolisport and West Loch Tarbert, the latter dividing Kintyre from Knapdale. To the east Loch Fyne separates Kintyre from the Cowal peninsula, which is itself split into three sub-peninsulas by Lochs Striven and Riddon and split on its east coast by Holy Loch and Loch Goil; south across the Kyles of Bute lies the island of Bute, which is part of Buteshire, and to east across Loch Long lies the Rosneath peninsula in Dunbartonshire. The topography of south Argyll is in general heavily mountainous and sparsely populated, with numerous lochs; Kintyre is slightly flatter though still hilly. Near Glen Coe can be found Bidean nam Bian, the tallest peak in the county at 1,150 m (3,770 ft). Of the lochs and bodies of water the largest are (roughly north to south) the Blackwater Reservoir, Loch Achtriochtan, Loch Laidon, Loch Bà, loch Buidhe, Lochan na Stainge, Loch Dochard, Loch Tulla, Lochan Shira, the Cruachan Reservoir, Loch Restil, Loch Awe, Loch Avich, Blackmill Loch, Loch Nant, Loch Nell, Loch Scammadale, Loch Glashan, Loch Loskin, Loch Eck, Asgog Loch, Loch Tarsan, Càm Loch, Loch nan Torran, Loch Ciàran, Loch Garasdale, Lussa Loch and Tangy Loch.