Thailand has a land area of 513,115 sq.km.(approx. 127,008 acres) bordered by Malaysia (South), Myanmar (West & North), Laos (North & East) and Cambodia (Southeast). The country's east coast borders the Gulf of Thailand and the west coast abuts the Andaman Sea. The country is divided geographically into four main zones-the fertile central plains, dominated by the Chao Phraya River; the 300-metre-high northeast plateau, the kingdom's most barren region ; the mountainous North; and the tropical southern peninsula.