Huin-yeoul Coastal Tunnel was formed in December 2018 to help the elderly and the infirm walk smoothly without going through the steep stair section between the piano stairs and wave square near Jeoryeonghaean Coastal Trail. The 70 meter tunnel not only give easy walking route, there's also a photo zone, lightings and more for visitors to enjoy. The lights within the tunnel are lit from 09:00 to 23:00.
