I didn't take any of these photos you see here - they're all from the website LehighValleyLive.com. You can visit their site to see and read more. I have been to some of the Allentown cemeteries.
The sink hole appears to have given way in the middle of a street, and will prompt the demolition of at least two nearby homes. You can see portions of West End Cemetery in the photos. The coroner has gotten permission to exhume and move bodies if need be.
This is in the historic "Old Allentown" district of the city. Watch this Fox 29 news video to appreciate the magnitude the problem. (Listen to the part about the guy whose foot went through his basement floor and the hole started to fill up with water!) When a sink hole occurs, no one really knows when it will stop growing or even how deep it is! This particular one may take weeks to fill and repair. Even more frightening is the possibility of underground mine fires associated with sink holes, the most infamous ones that burned for decades turning Centralia, PA, into the ghost town it is today.
It appears that the Allentown sink hole caused a water main break, adding insult to injury. A dozen homes near North Tenth and West Chew streets have been evacuated.
I used to live about fifty miles further north than Allentown, in far northeast PA, Larksville, to be exact. The mountain my parents lived on actually smoked - a light smoke would always be coming from the ground as underground mine fires slowly burned the coal buried down deep. You wonder how people live like that, but they do. Sink holes, big and small, were also a way of life - a result of a hundred years of deep vein coal mining in the region.