Food stalls at Tha Phrachan Pier

Authentic Thai food by the Chao Phraya River
Word to the wise: Maximise your time by combining a meal here with sightseeing. Nearby is the must-see Grand Palace complex, the former home of Thai kings.

This small area of food stalls serves all manner of tasty and cheap Thai dishes, such as roti (a type of flat bread often served with banana and condensed milk), roasted duck, and crispy garlic bread. Heavily frequented by students from nearby Thammasat University, this area is somewhat hidden and as such has retained a very local atmosphere.
At the pier, follow the crowd until you come to a small clothing market. Take the first right onto a small alley that bends back towards the river, and let your nose lead the way. Many stalls have seating, so grab a spot and tuck into some local favourites.