Time for a day at the beach, because the Edersee is definitely a bathing lake! How about a game of beach volleyball before you hit the stand up paddle board? Learning to sail, windsurf and water ski is a bit more difficult, but there are courses for that and you can rent sports equipment. Canoeing or kayaking is possible on either the lake or the river.
Getting around on a Segway is a cool way to see the area. There are also hidden treasures. With a bit of luck you will find one panning for gold on the Eder, the other on one of the six geocaching tours.
You should have a head for heights for the climbing forest, because the course runs from tree to tree at a height of three to eleven meters. At the end of the day you climb the forest to the roof on the "TreeTopWalk". You can experience the greatest outdoor fun on the summer toboggan run: adventure golf, outdoor laser tag and quad biking - adventure heart, what more could you want?