Cambodia is well-known as the Kingdom of Wonder, a Southeast Asian nation whose landscape spans low-lying plains, the Mekong Delta, mountains and Gulf of Thailand coastline. Phnom Penh, its capital, is home to the art deco Central Market, glittering Royal Palace and the National Museums historical and archaeological exhibits. In the countrys northwest are the ruins of Angkor Wat, a massive stone temple complex built during the Khmer Empire.