다만 제2 송도 마을의 해안 쪽 시멘트벽이 본래 바닷가 몽돌로 쌓은 벽이라서 성벽과 닮아 붙여진 이름으로 추정하기도 한다.
However, it is assumed that the cement wall on the coast of the Second Songdo Village was originally built with seaside mongdol stone, so it was named after resembling the castle wall.