There are ferries from Gudhjem, Allinge-Sandvig, and Simrishamn.
There is a natural harbour between Frederikso and Christianso, where you can put your yacht.
There are no cars on the islands, so you have to walk.
There are only about 100 inhabitants living on Ertholmene, but thousands of visitors come every summer. The islands are: Christians', Frederikso, and Grasholm.
Christinso is famous for its marinated herrings.
Ertholmene has 6 hotelrooms and a camping area. Or you cal sleep in your own yacht.