Thailand… one of the sadder places to dive. Once upon a time, it must have been incredible, but these days the number of tourists has scared away most wildlife. We dove in the famous Koh Similan of the Similan islands, and while we marvelled at what life remained, both of us were shocked by the number of tourists, the number of enormous speed-boats headed in and out, and the number of people in the water.
We resolved never again to take a tour boat to go diving in Thailand. It's just disheartening.