GENERAL INFORMATION
Than Bok Khorani National Park is a rainforest situated in the valley in the midst of the mountains. Streams flow through the area disappearing into the limestone rocks underneath the mountains, on their journey to the sea. The source of the stream is Nam Phut Cave and Ao Mai Dam Mountain (Black Tree Bay Mountain). This was formerly the territory of wild elephants, until people moved in and settled the area. They cleared the forest and took possession of the land for agriculture, until only the stream remained. The park was established on 30th September 1998.

GEOGRAPHY
Geography of Tarn Bok Koranee National Park is the ridge of mountains alternatively lying along north-south direction like a complicated wave and has varieties of deep slope. There is a little bit of plain area, most of them would be found on mountain shoulder and valley. The Limestone Mountains in this area are covered with the mixed tropical forest and in addition it also consists of mangrove forest, waterfall stream, sea and beach. More ever, there are a limestone island and many small islands, about 23 islands.

CLIMATE
The climate of this national park is a monsoon weather, consists of 2 seasons; raining and hot season or so called "eight raining-four sunshine" which means raining for 8 months and hot for 4 months.
- Raining Season starts from April till December every year. The heavy rain would be found in September while November would be cold with an average temperature at 26.4 degrees Celsius.
- Hot Season starts from the middle of January till April every year. February is the lowest of raining and very hot but suitable for travel. In April, the average temperature is 29 degrees Celsius.

FLORA AND FAUNA
The national park covers an area of 104 sq.km, including a group of 23 islands off the coast of Krabi as Chong Lat Tai Island, Ka Rot Island, Pak Ka Island, Lao Bile Island (Hong Island), etc,. The landscape is dominated by a series of impressive mountains; precipitous, tall, limestone towers, protruding out of the landscape in a typical Karsts topography. Sink holes in the rock lead the way to underground streams, and numerous mountain caves. Than Bok Khorani National Park is the source and watershed for the water of Ao Luek District and flowing from five important streams; Marui, Klang, Nam Tok, Ao Luek and Ka Rot.
The main plant communities are rainforest, mangrove forest, and freshwater swamp forest.
- Rain Forest is found on the steep mountain ranges, Hopea spp., Lagerstroemia spp., Dipterocarpus alatus, Intsia palembanica and Terminalia wallichiana being the dominant trees and the undergrowth is characterized by Salacca sp., rattan and bamboo.
- Mangrove Forest is mostly found around Tham Rot Tai Mountain, Nam Bay and Ka Rot Island. The main species are Rhizophora, Kylocarpus, Bruguiera, Sonneratia and Avicennia.
- Swamp Forest covers the foot slopes of Chong Lom Mountain. Because the forest no longer covers a wide, continuous area, the variety of wildlife is reduced.

Wildlife
- Mammals, include Wild boar, Fishing Cats, Mouse Deer, Gibbon, Langurs, Large Indian Civet, Malayan Porcupine, Pangolin, Otters, Squirrels, Javan Mongoose and Flying Lemurs.
- Birds, include Brahminy Kite, Common Koel, White breasted waterhen, Hill Myna, Woodpeckers and Grey Wagtail. The rivers are habitat for a wealth of freshwater species, including True Eel and Long Tom.
- Reptiles, such as chameleon, bengal monitor, king cobra, cobra, reticulated python, malayan pit viper, bronzeback, etc.
- Fish, whilst the sea supports coral reefs, with both hard and soft corals, Parrotfish, Starfish, and Anemones.