Radisson Blu Royal Garden Hotel, Trondheim

Radisson Blu Royal Garden is set directly on the banks of the river Nidelven at Kjøpmannsgata, with the Nidaros Cathedral and the colourful wharves of Bakklandet a short walk across the Old Town Bridge. The hotel's sauna and small indoor swimming pool are tucked into a basement wellness area — not the largest spa in Trondheim, but a quiet, well-kept room that most guests have nearly to themselves, especially after breakfast hours. The sauna at Radisson Blu Royal Garden is a standard electric unit paired with the pool, showers, and a 24-hour fitness centre. Because the facility caters only to in-house guests it rarely feels busy, and the sauna-pool-shower rhythm is complete enough for a proper wind-down after a day of walking Trondheim's cobbled streets or a business meeting in the connected conference wings. The river-facing location means you can open a window back in the room and hear the Nidelven run. For a practical, stay-and-soak option in Trondheim with a rare hotel pool alongside the sauna, Radisson Blu Royal Garden is a dependable central pick.