It’s a little off topic, but have you guys heard about the subterranean structures at Longyou China?
Ten Amazing Subterranean Structures from the Ancient World | Ancient Origins
http://www.ancient-origins.net/news-general-ancient-places/ten-amazing-subterranean-structures-ancient-world-001752
Now that’s some more amazing stuff like Derinkuyy (sp?)in Turkey.
Robert Schoch Ancient Mysteries and Civilizations
http://www.freerepublic.com/focus/chat/1480756/posts
http://www.freerepublic.com/focus/news/1546130/posts
http://www.freerepublic.com/focus/news/1845417/posts