Rosendal is a town and the administrative centre of the municipality of Kvinnherad in Hordaland county.
Rosendal is about 2-2,5 hours drive from Bergen, and about 2 hours drive from Haugesund. From Bergen you'll have to take one or two car ferries, depending on route.
There are buses going from Bergen to Rosendal. As this would require change of bus in most cases, and timetables on the web is mostly in Norwegian only, it may be easiest to contact the information phone 177 or a tourist information office.
Maybe the most comfortable way to travel between Bergen and Rosendal, the express boat Rødne Fjord Cruise have a couple of departures every weekday and one every saturday and sunday. The boat is a bit more expensive than the bus, but gives a traveller a much better view. If the view is not nice enough there is also free a wireless internet connection on board. The boat also have scheduled stops at Bergen airport on most trips.
Rosendal itself is barely a village and you can walk most places. In summer you can go by horse and carriage from the harbour to the Barony.
Apart from seeing the sights it's not much more to du in Rosendal itself, however the surrounding area is very nice for hiking, with beautiful mountain terrain. Several summits can be reached from footpaths that starts in Rosendal.
For more info on hiking in the area, ask staff of the place you are staying, or the tourist information office. It's a good idea to bring a map, and to make sure that you are in good enough condition for the trip you are planning. Note that many of the mountains in this area are very steep, so a short distance may take some time to cover (the view from the top however, makes it worth it!).
In Kvinnherad municipality 69 paths have been marked and graded, so that you can choose a walk that suits you.
Folgefonni Breførarlag, 5627 Jondal, +47 95117792, post@folgefonni-breforarlag.no.
Rosendal is a nice base for visiting the Folgefonna Glacier. Folgefonni Breførarlag have guided tours (and you will need a guide for walking on the glacier itself. It's also possible to walk up to the glacier through the Bondhusdalen.
Note that you may have to arrange your own transport from Rosendal to Mauranger, where some of the trips start (just less than 30 minutes of driving).
Most hotels also have restaurants open to people not staying at the hotel.