One of your first stops should be Tvedestrand Tourist Information. Here, you'll be able to find your bearings and get some great ideas before you begin exploring.
You'll soon find out why this Tvedestrand tourist information center is visited by many travelers. If you're searching for more to do and see here, Nes Iron Works, Tvedestrand Marina, and Nes Verk Golfpark are in the area too. They won't take very long to get to from Tvedestrand Tourist Information.