NWPaHeritage is a free app that puts the history of Northwestern Pennsylvania (Crawford and Venango Counties, and the Oil Heritage Region) at your fingertips. Explore unique historic places and take self-guided walking tours. Find interesting people, places and events in NW Pennsylvania history. With a growing list of interpretive stories, each point on the interactive GPS-enabled map includes historical information about the location, along with historic images from archival collections and historical publications.