Pennsylvania State Parks - Great Lakes Region - Park listings for Erie and surrounding area including Presque Isle State Park. - http://www.dcnr.state.pa.us/stateparks/parks/region_greatlakes.aspx
Nature Tourism in Northwest Pennsylvania - Includes information on agricultural sites, biking, birding and wildlife, forests, hiking, historical sites and museums, hunting and fishing, lakes, rivers and streams, and activities. - http://naturetourism.allegheny.edu/