The geography of Cambodia, a country in Southeast Asia, includes low-lying plains, the Mekong Delta, mountains, and the Gulf of Thailand coast. Its capital, Phnom Penh, is home to the dazzling Royal Palace, the art deco Central Market, and the historical and archaeological displays of the National Museum. The ruins of Angkor Wat, a vast complex of stone temples constructed during the Khmer Empire, are located in the northwest of the nation.