Sydfynske Øhav is island sea - or archipelago if you will - south of the Danish island Funen, comprising 55 islands and islets. It's one of Denmark's most scenic areas, and should be a top destination of anyone taking the time to explore Denmark outside the capital.
The islands was formed during the last ice age, by ice sliding over the area from the south, only the ancient hilltops was spared from submersion, and forms the many islands and islets peaking above the sea everywhere. The area has a milder climate than the country's average, and because of this, is home to flora and fauna not seen anywhere else in Denmark. There are strong local movement to convert the area into a National Park.
A few of the islands are connected with bridges, but to most of the islands transportation is done with tiny ferries ploughing through the island sea several times per day. The main entry points are Svendborg which is easily reach both by highway, bus and train - and Faaborg, which is best reached by bus from Odense. Yet another option is Rudkøbing on Langeland from where you can also catch a ferry to some of the islands. For easy reference ferries are listed under the individual islands.
Bringing a car to the islands serves little point but to rob your wallet of your hard earned cash, and you will be much better served by bringing or renting a bike in Svendborg or Faaborg, or just simply walk since the islands are generally small enough to make this feasible. While some islands are connected by the same ferry, you will generally have to go back to the mainland to pass between the islands, if you rely on public transportation.
However the best way to visit is really by boat, and there are plenty of options to do this. A popular option, and one good for your body, is by sea kayak  and there are serveral mapped routes in the area, but remember to be realistic about your fitness, as some of these routes take you a fair bit away from land, several rental outfits also gives you the option of trained guide, which can both provide information about the sights you visit, and make sure you are safe. It's also possible to rent Smack Dinghies with sails to ease the strain, or larger cattle barges if you are large group at Øhavet's smakkecenter in Rudkøbing.
Islands in the archipelago listed in east to west order:
Nearly all activities on the islands are related to getting around; biking or kayaking.
A few of the major islands are large enough to support their own guides, though practically they are part of the region.