A coastal section of layered Cretaceous mudstone at Sangjokam, on the western edge of Samcheunpo, holds hundreds of dinosaur footprints exposed at low tide. The clearest tracks are the three-toed prints of theropods and the round, heavy depressions of sauropod hindfeet, often arranged in clear trackways across the rock platforms.
A boardwalk wraps around the cliffs above the prints, with explanatory signs in Korean and (limited) English. The site is best at low tide on a clear day — at high tide much of the rock is submerged. A small interpretation centre at the entrance sells fossils, casts, and the requisite plastic dinosaurs.