Björken (The birch), Eken (The oak), Granen (The spruce), Rönnen (The rowan) and Tallen (The pine) are 4-bed cabins with one larger and one smaller bedroom. They were built in 1984–85 and have a living area of 42 m2. The tree-cabins are equipped with electrical heating, lighting, stove, oven, and refrigerator with freezer.