Pennsylvania
Underground voids from abandoned mines pose danger to people and property when land collapses
Swaths of Pennsylvania and many other states are honeycombed with old, unstable mines that can cause the earth to suddenly give way.
Rescue workers search through the night in a sinkhole for Elizabeth Pollard, who disappeared while looking for her cat, in Marguerite, Pa., Tuesday, Dec. 3, 2024. (AP Photo/Gene J. Puskar)
Swaths of Pennsylvania and many other states are honeycombed ... [4534 chars]