Similan Islands provided Close to, if not the best Diving I have ever done (Tonga coming in very close if not slightly better). We did 6 dives over two days - we were meant to do 7 but didn't have the stamina for a night dive after a 5:30am rise, a 3 hour bus/speedboat trip and 3 dives!The crystal clear warm waters of the Similan held much to discover. We saw sharks (leopard, black tip reef),