Named after the historic Cunard liner, the Mauretania restaurant allows diners to eat on board an atmospheric boat moored on the banks of the Wisła. Cross the gangplank before choosing either to dine outside on the top level, or inside a narrow timber room fitted out with forest green carpets, navigational dials and oil paintings of naval moments. The menu is not as nautically inclined as you would imagine, with the chef extending his repertoire to cover pastas, pancakes and green pepper steak.