Norrtälje in Sweden offers a unique experience to travellers. A gripping city on its own right, Stockholm also deserves a visit. Add Stockholm to your vacation plan, it has an interesting bunch of activities to do on your visit like Gamla Stan, Royal Palace, Vasa Museum. Also, to reach Norrtälje, you'll have to take a flight to Stockholm; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. Most online packages to this city are of 1-2 days.
Norrtälje is an affair to remember, follow this apt itinerary of the place and return home with a bunch of memories.