The dive through a tunnel

At Similand island Nr. 7 called Hin Pusa is a dive place called the Elephant head.
The site is named after an unusually shaped rock that juts out of the water just southwest of Koh Similan. The huge boulders that form Elephant Head Rock create daring swim-throughs, arches, caverns, gullies and tunnels.
One of my favorite diving places of all but due the heavy current it is a dive place for advanced and experienced divers only.