For fifteen years the writer Varlam Shalamov was imprisoned in the Gulag for participating in “counter-revolutionary Trotskyist activities.” He endured six of those years enslaved in the gold mines of Kolyma, one of the coldest and most hostile places on earth.
https://www.theparisreview.org/blog/2018/06/12/forty-five-things-i-learned-in-the-gulag/