The most famous floating market for foreign tourists is Damnoen Saduak Floating Market in Ratchaburi Province. If you want that picture perfect postcard shot I recommend this place. However, if you don’t want any foreigners in the picture that you must go there early. By 9:00 a.m. there is a traffic jam of tourist on boats. Most people go here from Bangkok on tours that include the Rose Garden or Sampran Elephant Ground.
Map showing location of Damnoen Saduak Floating Market in Ratchaburi Province: