The Amphawa Floating Market. It is not crowded by international tourists and the people beyond Bangkoks boarder are even more nicer. Get a boat ride through the market and have a lunch.
Insider tipp: Ask your driver to cross the river to Wat Bang Kung. It is a awesome temple, swallowed by a tree. If he don´t understand you, take a tuk-tuk again. However, go there!!
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