Remember that the waters of the island are incredibly crystal-clear. If you prefer nature, a great option is the hiking, there are several not very long routes that make walking a great attraction. Most do not take in doing more than one hour, so if there is to carry water, than the Sun tighten enough, as well as the camera so you don’t miss the spectacular photos that can be made. Here you can see a summary of the walking routes that are in the island. In regards to reach the island of Santorini, the Sporades Islands have mounted a phenomenal ferries transport system, which makes that move from one island to another is very simple. In fact, has daily connections with Piraeus port in Athens, to be able to come and go when you want (that if careful, that it takes as a minimum 5.5 hours). To inform you better, go to the websites of Blue Star and Hellenic Seaways, enterprises which are major and which have more supply of boats.
It is important to know that there are two types of ferries, the normal and the rapids. The seconds are more expensive, but if you go from Athens to Santorini, reduces time in 3.5 hours (normala 8 hours, rapidoa5.5). And the price difference is not much, about about 15 euros. Already within the island, maybe you cogwheels in bike or quad rental, since it is very small and runs easily. You can use public transport, but not advise it to you much, because although it is cheap, not reached all parts of the island (although covering major routes) and the hours are quite scarce. You have to walk very attentive because you can lose them easily, and the following happens up within a good time. In addition, almost always there making transshipment at Fira, what might that the trip is very heavy. Do you need information about the island? You can find a lot of information in Spanish on the web