Liveaboards to the National Marine Park – Similan Islands are available from Phuket and other areas of Southern Thailand. The most popular liveaboard tour is the three days and two-night liveaboard cruise with diving at Koh Bon, Koh Tachai and the Richelieu Rock. There are shorter scuba diving tours like the Similan Overnight Trip -2 days / 1 night with 7 world-class dives. The Similan Islands National Marine Park is only open between October and May each year.