Dear friends, here are some links to see the sink holes. Some are in the oil field here in Texas, one of the pictures shows a rig. Anyone else know of somemore sinkholes? http://www.rootsweb.ancestry.com/~txwin ... K_SINK.htm http://www.caver.net/other/winksink.html http://ga.water.usgs.gov/edu/earthgwsinkholes.html http://www.waterencyclopedia.com/Bi-Ca/ ... pment.html http://web.northnet.org/minstrel/eunice.1.htm http://en.wikipedia.org/wiki/Sinkhole Makes you wonder about the ground that you stand on. :wink: :wink: Glenn, have you seen the Devels hole there in Florida?