Tour agencies offer trips to the neighbouring islands for snorkelling, and the sea is really beautiful. Though there is not much to do in Sihanoukville, it is still a great place to spend a couple of days doing nothing, tasting freshly brewed Angkor beer (the first brewery of the brand in located in Sihanoukville) and wandering in the shadow of cannonball trees covered with big exotic flowers which are a distinct feature of a couple of Sihanoukville wats.