Hyeopjaegul and Ssangyonggul Lava Caves are believed to are actually made because of an eruption of Mt Hallasan around 25 million years back, and are considered to have already been below sea stage at the time as a result of presence of fossilised abalone shells together with other seashells. Beaches https://eduardoth20j.bloggactivo.com/26688961/facts-about-jeju-paradise-lsland-revealed