Bangkok, Thailand’s capital, is a sprawling metropolis known for its ornate shrines and vibrant street life. The boat-filled Chao Phraya River feeds its network of canals, flowing past the Rattanakosin royal district, home to the opulent Grand Palace and its sacred Emerald Buddha temple. Nearby is Wat Pho with its enormous reclining Buddha and, on the opposite shore, Wat Arun with its steep steps and Khmer-style spire. Bangkok traces its roots to a small trading post during the Ayutthaya Kingdom in the 15th century. It experiences three seasons, hot, rainy and cool, although temperatures are fairly hot year-round, ranging from an average low of 11.0 °C (71.6 °F) in December to an average high of 35.4 °C (95.7 °F) in April. The city of Bangkok has a population of 8,180,915 according to the 2010 census. Bangkok is one of the world's top tourist destination cities. Bangkok's multi-faceted sights, attractions and city life appeal to diverse groups of tourists. Royal palaces and temples as well as several museums constitute its major historical and cultural tourist attractions.