The Bang Pa-In palace grounds have a number of simple cafes selling soft drinks and snacks 10-20 baht. The best views are from the one inside the Tevaraj-Kanlai Gate, right opposite the Thai pavilion.
There are basic but rather unappetizing food stalls just outside the Bang Pa-In entrance. Central Bang Pa-In near the BKS station has more of the same, as well as the obligatory 7-Eleven across the road.
