Wat Arun is a Buddhist temple (wat) in the Bangkok Yai district of Bangkok, Thailand, on the Thonburi west bank of the Chao Phraya River. The full name of the temple is Wat Arun Ratchawararam Ratchawaramahawihan. Named after Aruna, the Indian God of Dawn, the Wat Arun is considered one of the most well known of Thailand’s many landmarks. The temple is so named because the first light of the morning reflects off the surface of the temple with pearly iridescence.
(wikipedia)