A wilderness hut, bothy, backcountry hut, or backcountry shelter is a free, primitive mountain hut for temporary accommodation, usually located in wilderness areas, national parks and along backpacking and hiking routes. They are found in many parts of the world, such as Finland, Sweden, Norway, northern Russia, the Alps, the Pyrenees, Scotland, Australia, New Zealand, Canada, and the United States. Huts are basic and unmanned, without running water. Bothy A bothy is a basic shelter, usually left unlocked and available for anyone to use free of charge. They are found in remote mountainous areas of Scotland, Northern England, Northern Ireland, Wales and the Isle of Man. Most are ruined buildings which have been restored to a basic standard, providing a windproof and watertight shelter. They vary in size from little more than a large box up to two-storey cottages. They usually have designated sleeping areas, which commonly are either an upstairs room or a raised platform, thus allowing one to keep clear of cold air and draughts at floor height. No bedding, mattresses or blankets are provided. Public access to bothies is either on foot, by bicycle or boat. Most bothies have a fireplace and are near a natural source of water. A spade may be provided to bury excrement. Biwakschachteln Shelters, known in German as Biwakschachtel, or bivouac box, can also be found in remote areas of the Alps. Even though Biwakschachteln are also tended to by Alpine Clubs, they differ markedly from other mountain huts, because they do not have a permanent resident who tends to the building and provides food and refreshments. There are eight Alpine countries (from west to east): France, Switzerland, Monaco, Italy, Liechtenstein, Austria, Germany, and Slovenia. The Solvay Hut or Solvay Bivouac (Hörnli Ridge) of the Matterhorn, near Zermatt, Switzerland. At 4,003 metres (13,133 ft) it is the highest mountain hut owned by the Swiss Alpine Club, but can be used only in case of emergency. Adirondack lean-to An Adirondack lean-to or Adirondack shelter is a three sided log structure popularized in the Adirondack Mountains of Upstate New York. Lean-to structures offer shelter for campers. Since their development in the Adirondacks, this type of shelter has seen use in a number of parks throughout the United States, such as Isle Royale National Park in Michigan and Indian Cave State Park in Nebraska. The Adirondack lean-to was developed by guides of the region as