Phang-nga Bay or Ao Phang-nga National Park covers a vast area both onshore and offshore of about 250,000 rais (100,000 acres), covering the areas of Amphoe Mueang, Amphoe Takua Thung, and Amphoe Ko Yao. It was declared a national park on 29 th April B.E. 2524 (1981). Ao Phang-nga National Park is the second seacoast national park after Tarutao National Park. It has striking scenic views because of a mass of limestone formations scattered around in the sea near the shore. Also, as a result of natural changes; caves and rock formations have been formed. The park is also fertile with mangroves. Best time to visit is between December and April. The most popular way to visit is a boat ride to various islands, which include:
Ko Panyi a small island made from limestone hills and plains. This is an interesting Muslim community. There are about 200 households of fishermen. On the island, there are many restaurants and souvenir shops.
Ko Phanak is a beautiful island with caves that house stalactite and stalagmite formations as well as small cascades, which flows onto several tiers.
Khao Phing Kan Named so because of its nature of being split into two halves. The smaller rock slid down, with its foundation stuck under the ground and the upper parts still leaning against each other. Behind the mountain is superb scenery. Looking into the sea one finds "Khao Tapu", a nail-shaped island, a solitary pillar in the sea. It is the most remarkable attraction of Ao Phang-nga National Park.
Khao Machu, a striking appearance rock formation is located on the way to Ko Panyi. It resembles a dog; its head, body, with a bushy tail.
Khao Khian, is on the way to Panyi Island. On the cliff which stands above the sea, there are pre-historic paintings featuring various kinds of animals. A study by the Department of Fine Arts has indicated that these paintings are over 3,000 years old. They are assumed to have been painted by seamen who use this place to escape from the monsoon.
Tham Lot is a lofty limestone cave with a giant hollow whereby boats can pass through. In the hollow, there are numerous stalactite formations on its ceiling, beyond the hollow is a beautiful sight of the mangrove forest.
Ko Hong, with big and small mountains. Sailing to this island gives you a feeling of being surrounded in a large hall with two doors. It will give you an immense feeling of the power of nature's creation.