Hi!For bouldering in Greece the best area is in Tinos island with lots of granite boulders.You can also find a boulbering guide here: http://www.gebro-verlag.de/gebro/tinosblock.htm In the guide you can find all the information of how to get there. There are also 50 single pitch climbing routes in the island and a handfull of multipitch.
climbing in greece and italy!