Wat Phra Kaew

It's also known as "Temple of the Emerald Buddha." Adjoining the Grand Palace, the temple is the greatest spectacle of Bangkok. There are over 100 brightly-colored buildings, all unique unto themselves. Built in 1782 during Rama I's reign, the Emerald Buddha, which gives it its name, is traced to India, centuries after Lord Buddha attained Nirvana and then had it enshrined in Bangkok. [Source]