Boats are from Rafina and take about 3 hours. The ferryboat goes to Gavrio. The Hermes Flying Dolphin goes to Batsi which is touristy but fun. Lots of activities and some great restaurants, particularly in the small traditional villages in the hills above. The best place is the main town of Andros on the other side of the island. No autos allowed in the village which juts out on a peninsula between two long beaches. There is a shipping museum and an excellent art museum there. Because of the wealth of the village tourism is not encouraged. Good reason to go there. Renting a car is recommended. This is a beautiful, green island that even has a small river or two. For more info click on above link. Ferry and Catamaran connections to Tinos, Syros and Mykonos daily.