Luxury hotel on the stockholm waterside with free wifi in stermalm district hotel diplomat is a luxury waterfront hotel in central stockholms stermalm district close to the nybrokajen dock youll be within a 10 minute walk of stermalmstorg t bana station which connects you to the citys central station in 10 minutes opera ballet fine art within 15 minutes you can walk to the royal opera house where you can enjoy an opera or ballet performance and take a tour of the historic building