The Emarald cave or morakot cave is located in no muk island Thailand, is a very interesting place, you have to swing 3 minutes aprox. through a cave, bring a head lamp that can get wet because it can get really dark, and once you're in the other side is this private beach and lots of nature.
we went for our own, so we only pay 200 bath pp, to enter . but there were a lot of tours going there
Aleja Buitrago Ospina
There is the sunshine and beaches of Phuket, and the Thai style of Chiang Mai is small and fresh, but there is no big city in Bangkok. Every year, Trang will gather new people from all over the world, wearing gowns to sneak into the sea, holding a romantic underwater wedding, and accepting the testimony and blessings of the little animals on the sea. Koh Muk is the third largest island in the four islands of Trang, with green water, white sandy beaches and pristine rainforest. Here you can completely relax yourself, enjoy the wonderful sunrise with your lover, feel the sea breeze on the beach, and ride a bicycle with friends to explore the magical rainforest. Don't forget to enjoy a sumptuous evening. Seafood dinner.