Philadelphia’s streets are playing whack-a-mole with sinkholes lately—thanks to ancient pipes leaking like sieves and turning solid ground into surprise swimming pools. One water main break in West Oak Lane opened a giant pit at an intersection, while the Schuylkill River Trail took months to patch because, well, old cities = old problems. From carbonate rock caves to sneaky underground erosion, sinkholes don’t RSVP—they just swallow your block when you’re not looking.
How Do Sinkholes Happen, And Can We Predict Them?
