The Five Islands, or "Koh Ha," is one of the most famous tourist destinations in Krabi Province. This archipelago consists of five islands, with Koh Ha Yai being the largest. Its shape resembles that of a sail, and it is renowned as one of the best spots for shallow coral reef diving. The highlight of diving around the Five Islands is the underwater cave, which is the largest of its kind and is located at Koh Ha Yai. This cave allows divers to enter without the need for artificial lighting, as there is only one entrance and exit, ensuring safety. Inside the underwater cave, divers can marvel at the stunning stalactites adorning the cave walls, as well as the breathtaking sight of sunlight streaming through the cave mouth from the surface—a truly remarkable experience that creates unforgettable memories. Moreover, the diverse snorkeling spots around the islands feature an array of colorful corals and schools of small reef fish, alongside larger species such as manta rays and whale sharks.