Hundreds of years ago, a group of Native Americans living along the lower Susquehanna River made an indelible mark on the valley. At what is now known as Safe Harbor, they made hundreds of carvings into the rocks found in the middle of the river. Animals, bird and animal tracks, directional symbols, teaching or storytelling images, humans and anthropomorphic images, spiritual symbols and geometric and abstract designs were painstakingly carved into the boulder strewn landscape of the river. F...