A (reconstructed) Baekje Ondol site (underground heating system from the Baekje era) from Gyeonggi Provincial Museum, Yongin, Gyeongi-do, South Korea
<a href="//commons.wikimedia.org/wiki/User:PuzzletChung" title="User:PuzzletChung">Puzzlet Chung</a>
2004-10-04
<span class="int-own-work" lang="en">Own work</span>