If you get a chance to go to the southwestern islands in Thailand, you have to visit the location of the "beach". It is one of the more beautiful places you'll ever visit if you get a chance to do a day trip to the gorgeous Maya Bay. Currently it is a national park, therefore it is ultra clean. This is easily the best photo opportunity beach on the planet, hire a boat driver and you are good. Enjoy "the beach!".
Epic does not do it justice, crystal clear blue waters, amazing marine wildlife and white sandy beaches will make your trip to Thailand legendary. It truly is an epic place to do backpacking through thailand, this is something you don't want to miss.