Stockholm is built on 14 islands, therefore several boat companies offer all kind of sightseeing tours by boat. The tours are multilingual and most boats leave from the Stromkajen just in front of the Grand Hotel.
In May 2004 I took the so called Royal Canal Tour (Djurgarden Runt), which mainly led around the island Djugarden. The trip took approximately 50 minutes and a single ticket cost 110 SEK.
Although a bit of a tourist trap (and almost embarassing to Swedes doing the tour, as we are told of Swedish succcesses and alcohol monopolies), you DO get an overview of Stockholm and if you haven't grasped it before, now is when you understand what "City on Water" means as you go through two locks (sluices) and see several islands in the city centre. If going in the late afternoon, you also realise how small a sightseeing boat is compared to a ferry bound for Finland...:-)))
Fondest memory: Being born...actually in the main southern hospital pointed out during the sightseeing tour -)))
Favorite thing: A city built on islands is a great concept, so why not view it from the water? There are several places where you can tour the city by boat. This place is right in between Stadshuset and Riddarholmen, which you can see on the right side of the picture.
When you are there, make sure you take a ferry from Djurgarden to the old city center of Ganlan Stan! A lot of people do that everyday for work! The open air park of Skansen (Djurgarden) shows the old houses of Sweden and also a zoo and is very worth visiting!
Fondest memory: Without doubt the beauty of the Archipelago! We went for sailing and camped on one of the small islands, this is allowed as long as you do not damage nature! There was no darkness so the picture below is taken at 3h00 after midnight!
Favorite thing: The boat tour around stockholm is great - the one I took was 90 minutes and you got to see several areas of Stockholm. I got the tour near the city hall building.
Favorite thing: You can take a guided tour on the water around the islands of Stockholm. You'll find the boats next to Grand Hotel.