Wat Phutakhian

This is a temple that hasn't been dressed up for visitors, and that's the whole appeal. It's an active place of worship in Sai Yok, west of Kanchanaburi town, so what you see is whatever the community happens to be doing that morning, whether merit-making, chanting, monks going about their day. Nobody will hand you a leaflet.

My advice is to go early, when the light is soft and the grounds are still cool, and to treat it as a stop rather than a destination. If you're driving the Sai Yok route toward the waterfalls or the national park, it slots in easily. If you're the sort of traveler who wants a temple with signage, a ticket desk and a gift shop, skip it and stick to the bigger names nearer the river. The reward here is quiet, and quiet only.