Located on the west side of Chao Praya River (opposite Tha Thien Pier) 10600
Wat Arun, locally known as Wat Chaeng, is situated on the west (Thonburi) bank of the Chao Phraya River. It is easily one of the most stunning temples in Bangkok, not only because of its riverside location, but also because the design is very different to the other temples you can visit in Bangkok. Wat Arun (or temple of the dawn) is partly made up of colourfully decorated spires and stands majestically over the water.
Read more at: http://www.bangkok.com/attraction-temple/wat-arun.htm?cid=ch:OTH:001