Bunker'n is a wood-fired sauna built in 2021 inside a Second World War bunker at Østmarkneset on the Ladestien coastal path, and Stu calls it Trondheim's first publicly available sauna. It holds 12 people and is booked privately for three hours at 1,199 kr; guests light the stove themselves, allowing about an hour to heat, and cool off in the fjord. On weekends Stu runs 60-minute Aufguss-inspired rituals for up to 10 people.