This art card was sent to me by Virpi from Finland via postcrosing [FI-947881]. She writes me that in Finland "even small children bath in the sauna" and there are over 3 million saunas for 5,5 million people!
According to wikipedia, a sauna is a small room or house designed as a place to experience dry or wet heat sessions, or an establishment with one or more of these and auxiliary facilities. A sauna session can be a social affair in which the participants disrobe and sit or recline in temperatures typically between 60°C (140 °F) and 100°C (212 °F). This induces relaxation and promotes sweating. Saunas can be divided into two basic styles: Conventional saunas that warm the air or infrared saunas that warm objects. Infrared saunas may use various materials in their heating area such as charcoal, active carbon fibers, and other materials.
The word sauna is an ancient Finnish word referring to the traditional Finnish bath as well as to the bathhouse itself. The proto-Finnic reconstruction is savńa. There are etymological equivalents in the Baltic-Finnic languages such as the Ingrian and Votic word sauna, Estonian saun and Livonian sōna. The word suovdnji in Sámi means a pit dug out of the snow, such as a hole for a willow grouse. In Baltic-Finnish, sauna does not necessarily mean a building or space built for bathing. It can also mean a small cabin or cottage, such as a cabin for a fisherman. There still exists an old saying, "saunassa ollaan kuin kirkossa" – you should sit in the sauna as in a church.
She haw also put some beautiful stamps, two of them are cross-shaped :D