One of my favourite places in Thailand is Koh Phi Phi, a region with a lot of history behind it, full of natural beauty, very beautiful beaches, no cars get there so everything you do on foot which adds to the fun in my opinion. If you head to the main island my recommendation is to visit long beach during the day. The beach there is a lot nicer and it has a more chill relax vibe into it which is great for taking photos.
