Archbald Pothole State Park in Lackawanna County protects one of the most unusual geological formations in the northeastern United States — a massive glacial pothole carved during the Wisconsin Ice Age roughly 15,000 years ago. At 38 feet deep and 42 feet in diameter, the Archbald Pothole is the largest known glacial pothole in the world, formed when swirling meltwater and debris bored into the bedrock beneath a retreating glacier. A viewing platform lets you peer directly into this remarkable natural curiosity.

Spread across 150 acres of wooded Pocono Plateau landscape, the park offers hiking trails that wind through mixed hardwood forest, connecting to views of the surrounding valley. Picnic pavilions and open grassy areas make it a solid spot for a family afternoon. Fishing is available at a small pond stocked seasonally, and in winter the trails see use for cross-country skiing and snowshoeing when conditions allow. The park does not offer camping facilities, so plan this as a day trip or pair it with an overnight stay at nearby Lackawanna State Park, which has both tent and cabin options about 15 minutes north.

Established in 1964, Archbald Pothole is compact enough to explore in a couple of hours, making it an easy add-on to a broader Pocono or Endless Mountains itinerary. Late spring through mid-fall offers the best conditions, with autumn foliage particularly rewarding in early October. Come for the geology — it’s genuinely impressive once you grasp how it formed — and stay for a quiet walk through the woods.

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