To those who enjoy outdoor adventure, Pennsylvania offers a number of natural attractions: wild rivers, impressive mountains, the silence of deep forests. But Pennsylvania's sublime overlooks, remarkable natural features in themselves, frequently go unnoticed despite their historical and scenic interest. (Few people realize, for instance, that a Pennsylvania overlook--Mt. Pisgah in York County--almost became our nation's capital.) Visitors to these promontories acquire a fresh appreciation of nature's beauty and a renewed sense of connection to the Pennsylvania landscape.

In...