If you are ever travelling to Hua Hin, Cha am or beyond, the Maeklong Railway Market is worth a stop. Close to the expressway and also the floating markets at Amphawa and Damnoen Saduak, a visit to the Railway Market is am impressive experience.
Health and Safety Executives in many parts of the world would be horrified by a market which is literally on an operating railway line. When a train passes by (on my visit it arrived at 11.10am), the market traders clear everything and the trains pass through. Very impressive.