The Katajanokka prison building, protected by the National Board of Antiquities, forms a unique setting for a hotel visit. The old prison cells have undergone a thorough transformation. By uniting two or three cells and adding a modern interior design, 106 high-class hotel rooms with all the modern conveniences have been created. The most authentic prison atmosphere can be found in the Jailbird restaurant in the basement floor. Only a few short steps, and you are out in the sunny and verdant Linnanpuisto park.