The Mae Khlong-Mahachai railway is an odd stretches of track which do not connect with the main network.It runs between Wong Wian Yai in Thonburi, West Bangkok, and Samut Songkhram on the Gulf of Thailand . Originally constructed as a private line to take sea produce from the fishing ports of Samut Sakhon and Samut Songkram to the markets of Bangkok, it later became part of the State Railway of Thailand, though it was never physically connected to the rest of the network.
Catch the old 3rd class train through surprisingly unspoilt countryside,pass people's backyard and terminating in the middle of the fresh food market in Samut Sakhon, formerly known as Mahachai. Get off the train and take the 3 baht ferry across the Tha Chin river, you will find a parallel station on the west bank. Trains connect from there to Samut Songkhram on the Mae Khlong river - thus the name Mae Khlong-Mahachai Railway
The market lies between Rat Banchop Road to the north, and Sukhaphiban Road to the south. It is one of the largest fresh seafood markets in Thailand, and if you want to sample it, many stalls and small restaurants serve fish, prawns, crab and other seafood, freshly cooked in Thai style.