Introduction to Cambodia Cambodia, officially known as the Kingdom of Cambodia, is a country located in the southern part of the Indochina peninsula in Southeast Asia. It is bordered by Thailand to the northwest, Laos to the northeast, Vietnam to the east, and the Gulf of Thailand to the southwest. Its capital and largest city is Phnom Penh. The country is best known as the home of Angkor Wat, the largest religious monument in the world, a symbol of its profound historical and cultural heritage.