Sungai Batu Pillbox (GPS: 5.28429, 100.23714) is a coastal World War II bunker in Sungai Batu, Penang. The pillbox is in an advanced state of ruin, hanging precariously on the slope above the waterline, with part of it having fallen down. The pillbox has not been restored in any way, and could well fall into the sea in the near future.