Krabi Province

Hat Noppharat Thara–Mu Ko Phi Phi National Park has an area of 242,437 rai (38,790 ha) of which 200,849 rai (32,136 ha) is sea. There are three distinctive kinds of forest here: moist evergreen forests, mangrove forests, and peat swamp forests.

Once a large freshwater swamp, the habitat of diverse mollusks of about 2 cm in size, Su-san Hoi features a slab formed from a huge number of embedded mollusks which can be dated to approximately 40 million years ago. With changes on the surface of the earth, seawater flooded the freshwater swamp and the limestone elements in the seawater enveloped the submerged mollusks resulting in a homogeneous layer of fossilized shells 40 cm thick known as Shelley limestone. With geographical upheavals, the limestone layer is now distributed in great broken sheets of impressive magnitude on the seashore.

The park covers an area of 121 km². The landscape is dominated by a series of limestone mountains, evergreen forests, mangrove forests, and numerous islands. The main flora is evergreen forest, peat swamp forest, strand forest, and mangrove forest, as well as various types of marine flora. Other attractions include: Than Bokkhorani (ธารโบกขรณี) which is home to various flowing streams and numerous pools of different cascades among a shady forested area and two caves, Tham Lot and Tham Phi Hua To (ถ้ำลอดและถ้ำผีหัวโต).

An area of hot springs in a shady forest. The temperature is at 40-50 degrees Celsius. The hot springs and cool streams converge on a slope to form cascades of warm water.

Covering a total area of 152 km², Mu Ko Lanta National Park is in Amphoe Ko Lanta and consists of many islands. Some major islands are Ko Lanta Yai, Ko Lanta Noi, Ko Taleng Beng, as well as, other surrounding islands like Mu Ko Ha, Mu Ko Rok, and Ko Ngai.