Sabi sa comments section, weep hole daw at dapat engineer ka bago magdadakdak. Everyone knows it’s a weep hole or some sort of drainage (nakalagay na nga sa caption and Sec. Dizon also explained how it works) - the issue here is that the pipes are not even connected to the retaining wall. Kung titignan niyo nga yung nasa surroundings, hindi pa naka-attach properly. Nakausli pa nga yung mga pipes.