Sinkholes.........they are an issue for property owner's in Florida especially for those who own real estate in what is known as "Sinkhole Alley" namely land in Hernando, Paso and Hillsborough counties. Interestingly, today I spotted a news video in the Wall Street Journal that shows a sinkhole opening up in the land down under..Australia...http://www.wsj.com/video/giant-sinkhole-opens-in-backyard/ED4DC558-6AB4-4AE8-8E1C-1132F685EDBC.html