In ancient Viking culture, kitchens were an essential part of daily life, and some incorporated a built-in steam room known as a 'bastu.' These steam rooms were used for cooking, as well as for bathing and relaxation. The ancient Vikings believed that steam had purifying properties and used it for various purposes. The bastu in ancient Viking kitchens were typically made of wood and featured a system that produced steam. The steam would then be used for cooking, particularly for steaming fish, meat, and vegetables. It was believed that steaming helped enhance the flavors and nutritional value of the food. The steam rooms also served as a place for relaxation and rejuvenation, with the steam believed to have therapeutic effects. People would often spend time in the bastu, enjoying the warmth and steam while taking care of their physical and mental well-being.