Maya Bay is indescribable. It's a beach on an island that's surrounded by mountains, all kinds of vegetation, and clear water. It's supposedly among the 10 most beautiful beaches in the world. The diving is spectacular and I saw leopard sharks, tropical fish, scorpion fish, and turtles. I've had some pretty incredible experiences during my travels but I have to say that visiting Maya Bay was one of the coolest things I've ever done. "The perfect day," if you will. I think it's one of those places that everyone should visit at least once in their lives.
It's located on the island of Ko Phi Phi which you can reach from many of the local resort areas.