Wondering where this all comes from? Why is sweating such a prevalent part of culture in northern climates?
Check out these articles below:

Banya:
Banya of Russia and history of steambathing – Mr. Steam Blog
Book: Without the Banya We Would Perish
Sauna:
Finland’s quirky love of saunas – This is Finland
The history of the sauna – Tylo Life
A new sauna culture: Re-imagining the bathhouse as a community space – The Globe and Mail
Book: The Joy of Sweat
The German Aufguss:

Aufguss sauna ritual – Wander Magazine
German aufguss: When tradition turns trendy – Tylo Helo
Germany’s sauna obsession – Spiegel Online
What to Expect in a Germany Sauna – Trip Savvy
What is Aufguss – Aufguss: the ritual in sauna
Nudity in German saunas:
Nudity in Germany: Here’s the naked truth – CNN Travel
Germany: Nude spas not for the faint of heart – Go NOMAD
Sweat lodge:
What I learned from participating in a traditional sweat lodge ceremony – HuffPost Blog