You might not have known that the largest submarine in the word, the 174 meter (575 ft) long submarine of the Typhoon class, has got a sauna inside. Ok, once you've learned this you probably can imagine a pretty big roomy
sauna (as the submarine is so big) but no, the sauna is pretty humble. Oleg, the blogger, has taken a rare chance to sneak into this underwater giant and take some photos of its "SPA" center. Let's see!