Whilst here I did my PADI open water course, which is basically a scuba diving qualification which allows you to dive about a lot, so did plenty of dives while here. Saw loads of fish and that, sharks, turtles and reefs and whatnot. All a lot of fun. It's like flying, but underwater, imagine that!
Sadly, Phi Phi was one of the most badly affected places by the 2004 tsunami and is still being slowly rebuilt - a process not helped by the island not having any roads. However, they do have a tsunami evacuation route cleared marked on the island which basically summed up is "leg it up the hill".