Myvatn Nature Baths, crater hills south of the road. Steam vents there have long been used for steam baths, which are considered beneficial for rheumatism. Southeast from Myvatn Nature Baths, about 1 km from the main road in Bjarnarflag are the Earth Baths at Lake Mývatn. The lagoons are manmade structures with bottoms containing sand and gravel. The nature of the water is in some aspects very unique. It contains a large amount of minerals, alkaline and is therefore very suitable for bathing. Because of the mineral content, undesirable bacteria and vegetation do not thrive in the lagoon which makes the use of chlorine or other disinfectant unnecessary.