The islands are about 45 km away from the bay (1 1/2 hours). There are 27 islands rich in reef. I went on a tour and spent a whole day in one of the islands. The price included lunch. You can also go diving in some of the islands, and in San Martin island there is an aquarium called Oceanario where you will be able to see different species in the region. Some islands also have hotels where to spend a night or a few days. In any case, all of these must be transacted in Muelle de los Pegasos.