5. Ondol heating system: The Ondol heating program, which consists of heating stone slabs less than the ground with fireplace, is a standard feature in conventional Korean architecture which includes These found on Jeju Island. Numerous buildings on the People Village also use this process for heating during chilly winters. https://gregory9bo4v.blogolize.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-jeju-culture-70594658