Serenity Spa is on the ground floor of Hotel Riverton by the Göta älv river. It has three saunas, a traditional dry sauna at 70–80°C overlooking the pool, an aromatherapy sauna and a hammam steam room, plus a 37°C indoor pool under marble arches, experience showers and heated loungers. Non-guests can book day spa from 595 SEK, Sunday to Thursday, by email. Swimwear is required and the minimum age is 18, or 16 with a guardian.