The boat tour is a great way to see the majority of Stockholm in a short space of time and also get a lot of information. The boat tour lasts for 2hrs and takes you from Strömkajen (the ferry terminal near the grand hotel) through the locks to Lake Mälaren, pointing out all the sights on the way. Costs 280 SEK if you purchase your tickets on the day, less if you buy online. Minibar/cafe on board serving coffees, cakes and beers.