sinkhole, 天坑

Giant holes
A giant sinkhole that swallowed several homes is seen in Guatemala City February 23, 2007. At least three people have been confirmed missing, officials said. (REUTERS)
see more
Giant sinkholes
http://news.yahoo.com/photos/giant-holes-slideshow/
感謝您的光臨 "est100 一些攝影", (非營利, 沒刊登廣告) . Thank you for visiting  "est100 some photos" , (non-profit , No Advertising).  ( okok ten times "1" ) http://okok1111111111.blogspot.tw/
est100 一些攝影 4 (非營利, 沒刊登廣告) 健康, 知識.   est100  some photos - 4 Health,  Knowledge  (non-profit , No Advertising) http://okok987654321.blogspot.tw/