Christmas Point is a well known Similan Islands dive site as it has one of the best swim throughs in the region. Comprising of a pinnacle and a cluster of huge boulders made up of granite, it is also a place for spotting both leopard sharks and blue spotted rays. The depths are around 10 to 40 meters with the best spots being around the 25m deep swim through and the pinnacle. The visibility is very good getting to 30 meters on most days allowing divers to see all the way to the bottom of the swim through.
The corals are in good condition and include many staghorn coral and hard coral gardens that host cuttlefish, sea cucumbers, starfish, and many invertebrates. Amongst the crevices of the coral and boulders, there should be ribbon eels easily spotted by most divers.
The swim through is shaped like an arch, and is covered with many different soft corals and sea fans. It is surrounded by many crevices that host giant sweetlips and many groupers.
At the bottom of the rocks at around 40 meters, there are often resting larger fish such as leopard sharks, white tip reef sharks, or blue spotted rays. Amongst the boulders, there will also be larger pelagic fish such as tuna, barracuda, trevally, and larger fish such as Napoleon wrasse.