Trough Creek State Park, Huntingdon, PennsylvaniaBalanced Rock is the star here, a giant boulder that looks like it might tip over at any second. Linn Run State Park, Rector, PennsylvaniaDeep in the Laurel Highlands, this small park packs a lovely waterfall into a rocky walk. Promised Land State Park, Greentown, PennsylvaniaSitting high on the Pocono Plateau, this park feels wrapped in thick forests of pine and hemlock. Oil Creek State Park, Oil City, PennsylvaniaHistory and nature blend together beautifully here, where the world’s first oil boom once took place. Lehigh Gorge State Park, White Haven, PennsylvaniaSteep rock walls line this long, narrow park that follows the Lehigh River for miles.