I think Amphawa Floating Market is in Samut Songkhram, which is the next province south/west of Samut Sakhon. (The largest wholesale seafood market, Maha Chai is in Samut Sakhon.)

Samut Songkhram is amazing to tour around with quite a few famous temples and attractions, but you need a car.

The Rama II park is definitely worth a visit.

https://en.wikipedia.org/wiki/Samut_Songkhram_Province


I think most of the floating markets are for domestic/foreign tourists, eager for a glimpse of the olden days. You see a lot of this nostalgia in markets these days. "Boat Noodles" are rarely served from a boat, rather everyone just fashions a khlong boat into their land-based shop.

Not too far from Suvarnabhumi Airport (SBIA/BKK) is a temple: Wat Bang Phli Yai Nai which has one of the most traditional canal-based markets I've seen. A large portion of it burned a few years ago, and has been rebuilt, the first stretch from the temple is original.

Or Tor Kor is interesting, it is a clean, spiffed up, organic version of a traditional Thai wet market, very high-end. JJ Mall is nearby, which offers Chatuchak-like stuff in an indoor/aircon, 7 day environment (like Platinum Fashion Mall vs. Pratunam).

The (pre-paid/Level 6) food court in MBK has been refurbished and enlarged and is quite nice. My favorite Food Court currently is Food Republic (a Singaporean company) with outlets in Siam Center, Central Rama 9 and Mega Bang Na. But any food court in any mall/office park/building is usually reliable, clean, comfortable.