What is Finland famous for?

Finns invented the sauna, which is called the quintessence of Finland. Finnish proverb says: build a sauna first, then build a house. Sauna is one of the few Finnish words that have entered the world language category. Finnish children can take a sauna in a mini mobile sauna. Saunas in Finland must be built entirely of wood, including steam rooms, bathrooms and changing rooms. There are millions of saunas of different sizes in Finland, with an average of one sauna for every three people, the highest density in the world. For those who travel to Finland, they have never been to Finland without a sauna.