The word sauna is an ancient Finnish word referring to the traditional Finnish bath as well as to the bathhouse itself. The Finns also used the sauna as a place to cleanse the mind, rejuvenate and refresh the spirit, and prepare the dead for burial. In Finland, the sauna still is an important part of daily life. As the home of the sauna, Finnish sauna culture is well established; today there are built-in-saunas in almost every house in Finland. Around the world today in physical education complexes, public sports and recreation centres, public and private swimming pools, public and private gymnasiums; it is almost certain that these locations will also have sauna facilities. Today we use a wide variety of sauna options. Heat sources include wood, electricity, gas and other more unconventional methods such as solar power. There are wet saunas, dry saunas, smoke saunas, steam saunas, and those that work with infrared waves.