Oh wow, that sounds awesome. My wife and I have been trying to see the northern lights for a while now. I have seen them a couple of times, but she never has. Up North in the UP, they have the circular style saunas made of cedar or whatever the wood is.
https://www.dewyseconstruction.com/index.php?page=Barrel_Saunas
They look pretty cool! The same guy from Dallas has his summer place with his brother in Finland, and it is buried underground. It is a smoke sauna - they have two others there also :D
Some sauna: https://sauna.fi/en/sauna-knowledge/a-good-smoke-sauna/
Nice!