Cambodia is a kingdom in Southeast Asia. It is 181,035 square kilometres (69,898 square miles) in area, bordered by Thailand to the northwest, Laos to the northeast, Vietnam to the east, and the Gulf of Thailand to the southwest. Cambodia has a population of over 15 million. The official religion is Theravada Buddhism, practiced by approximately 95 percent of the population. The country's minority groups include Vietnamese, Chinese, Chams, and 30 hill tribes. The capital and largest city is Phnom Penh, the political, economic, and cultural centre of Cambodia. The kingdom is a constitutional monarchy with Norodom Sihamoni, a monarch chosen by the Royal Throne Council, as head of state. The head of government is Hun Sen, who is currently the longest serving non-royal leader in South East Asia and has ruled Cambodia for over 30 years. Cambodia has become a popular destination and the country is developing fast. The city of Siem Reap was about thirteen years ago a small place with dirt roads and one traffic light, nowadays is the most touristic city of the country and the historical heart of Cambodia. The temples of Angkor is about seven kilometers of the city center and there are a lot of facilities to entertain the tourists from all over the world. But Cambodia is not only Angkor Wat. This fascinating, friendly country has so much more to offer. Countryside tours, floating villages, white sand beaches, tropical islands, jungle trekking, the mighty Mekong river, bicycle tours, cooking class, waterfalls, hilltribes, and much more.