World's Largest Glacial Pothole
Archbald Pothole State Park, 960 Scranton Carbondale Hwy, Archbald, PA 18403, USA
About
This 150-acre state park exists entirely because of one thing: the world's largest glacial pothole, a 38-foot-deep hole carved by swirling meltwater 15,000 years ago that would take 35 fire truck tankers to fill. You view it from a fenced platform steps from the parking lot. Free; open second Friday of April through third Saturday of November, dawn to dusk.