Wondering about the shifting ground beneath your feet? If you are wondering if sinkholes could be an issue at your home or business, you can find out exactly which areas in Pennsylvania are considered to be "karst" or a region with limestone. Sinkholes occur when limestone and or dolostone in bedrock dissolve due to acidic water formed when water and carbon dioxide mix. Sinkholes can also occur when deposits within natural rock fractures are washed away, causing the hole to open up.

The map below, courtesy the Pennsylvania Department of Conservation and Natural Resources, shows areas of Pennsylvania where sinkholes have opened up or where depressions in the earth, which could indicate a future sinkhole, have been recorded.

For more on sinkholes, click here.