Hyeopjaegul and Ssangyonggul Lava Caves are believed to have already been designed as a result of an eruption of Mt Hallasan about 25 million many years in the past, and they are believed to are already under sea degree at the time due to the existence of fossilised abalone shells https://hector08fmu.activablog.com/26657598/rumored-buzz-on-jeju-paradise-lsland