Wat Arun — the Temple of Dawn — is a 17th-century spire rising over the Chao Phraya River on Bangkok's Thonburi bank, its pagoda encrusted with fragments of Chinese porcelain salvaged from a shipwreck. The view from the opposite bank at sunrise is the whole point.
Wat Arun is the most photogenic temple in Bangkok — possibly in Thailand — and it earns that status from the water, not from inside its gates. The name literally means Temple of the Dawn, and it was named at sunrise by a king arriving by boat; that framing still tells you exactly how to see it. The real decision isn't whether to go — it's whether to cross to the Thonburi side at all, or just take the view from the eastern bank.
Yes — it's consistently ranked among Bangkok's top three temples alongside the Grand Palace and Wat Pho, and for good reason. Go at sunrise from the opposite bank and the answer is an easy yes.
Entry to the temple complex is 200 baht per person; the cross-river ferry to reach it costs around 4.5 baht. Prices move — check before you go.
Take the cross-river ferry from the eastern bank early in the morning before crowds and traffic build. Combine it with nearby Wat Pho — both are within easy ferry distance of each other along the Chao Phraya.