The best start on your trip is to go to the tourist information, there you can get maps and information of Nyköping for free. Here you can also buy souvenirs, post cards and books about Nyköping.
The tourist information center is located in the town hall by the Stora Torget (great square).
The adress is Rådhuset, Stora Torget, 611 83 Nyköping
Tel: +46 (0) 155-24 82 00
Favorite thing: Spend a day out at sea in the great archipelago. "Saga Lejon" takes you on longer trips, even down to St Anna archipelago south of Norrköping and to Västervik some days (when you arrange your own return journey) and the smaller, cheaper and less romantic "Labrador" takes you on daytrip cruises to nearby Trosa and around beautiful Stendörren and also does "prawn buffets" in the evenings.