I am by no means an expert, but the area around Lysefjorden offers many opportunities for great hikes. Preikestolen, Kjerag, Sollifjellet to name just a few. Hardangervidda is really beautiful as well, you can walk up to Glaciers and lots of interesting places. My next trip will be to Jotunheimen, I can’t wait to experience the area. In general, Norway is wild and many hikes are quite demanding, and the weather in the mountains can change quickly, so be prepared and bring appropriate clothing (definitely bring raingear).