Wat Arun is the striking riverside temple covered in colorful broken porcelain that looks especially beautiful at sunrise or sunset. Expect a steep, 70-meter climb up the central prang with narrow stairs and decent views over the Chao Phraya River and Bangkok skyline. The surrounding grounds are peaceful and much less crowded than the Grand Palace. The whole visit usually takes 45-90 minutes unless you combine it with Wat Pho or a river boat ride. It's genuinely pretty, especially lit up at night from across the river, but the climb itself is more memorable than the temple interiors.
Best time to visit is November to February when it's cooler and drier. Go early morning (opens around 8am) to avoid the worst heat and crowds. Expect to pay around $2-4 for the temple entrance; add $10-25 per person if you join a half-day guided tour that includes Wat Pho and transport. River crossings by small ferry cost almost nothing and are part of the fun.
Honest tip: climb the main prang once for the view, then skip the smaller surrounding structures and just wander the riverside gardens. Pair it with Wat Pho on the same morning rather than doing a full-day temple marathon. If it's over 35°C or you're not up for steep stairs in the sun, admire it from the opposite bank with a cold drink instead.
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