Dong Phaya Yen (Thai ดงพญาเย็น, lit. Jungle of the Ice Lord) is a mountain range in central Thailand. As the southwestern extension of the Phetchabun mountains it is part of the division between the Chao Phraya river valley and the Khorat Plateau of northeastern Thailand. It has a length of about 230 km, and is continued by the Cardamom Mountains to the south and the Dongrak escarpement to the east. Western chain in morning fog with the Pa Sok valley in front The Phetchabun mountains are a mountain range in Thailand. ... A view of the Chao Phraya River in Bangkok The Chao Phraya (Thai แม่น้ำเจ้าพระยา) is a major river in Thailand, with its low alluvial river plain marking the mainland of the country. ... The Khorat Plateau is a highland in the north-east of Thailand, also called Isan. ... The Krâvanh Mountains, or literally Cardamom Mountains (Khmer regular script: , Chuor Phnom Krâvanh; Thai: เขาบรรทัด, Khao Banthat), is a mountain range in the south-west of Cambodia, near the border with Thailand. ... The Dângrêk Mountains (Khmer regular script: , Chuor Phnom Dângrêk; Thai: ทิวเขาพนมดงรัก, Thiu Khao Phanom Dongrak), meaning Carrying-Pole Mountains in Khmer, is a low mountain range (average elevation 500 m) serving as the border between Cambodia and Thailand. ...

The mountains are drained to the north by several tributaries to the Mun River, while the south drains into the Prachinburi River. The area changes in altitude between 100 m and 1,351 m above sea level, with the Khao Rom as the highest hill. Several national parks are located in the moutains, the most famous one is the Khao Yai National Park, which was the first national park of Thailand. Other parks are the Ta Phraya National Park at the boundary to Cambodia, the Thap Lan National Park, Pangsida National Park, Phra Phutthachai National Park and the Dongyai Wildlife Sanctuary. Altogether 6155 km² are protected in these parks. The Mun River (Thai แม่น้ำมูล) is a tributary of the Mekong river. ... Khao Yai National Park is a national park in Thailand. ...

In 2005 the forests of the Dong Phaya Yen mountains were inscribed on the UNESCO World Heritage List under the name Dong Phaya Yen – Khao Yai Forest Complex. 2005 is a common year starting on Saturday of the Gregorian calendar and is the current year. ... UNESCO logo The United Nations Educational, Scientific and Cultural Organization, commonly known as UNESCO, is a specialized agency of the United Nations system established in 1946. ... Elabana Falls is in Lamington National Park, part of the Central Eastern Rainforest Reserves World Heritage site in Queensland, Australia. ...