Throughout Pennsylvania, within the state forest system, are 61 officially designated Natural Areas, each offering a bit of wildness deemed worthy of protection
Pennsylvania Naturally describes all the habitat types, all the soils and all the native plants -- but it's also a toolkit of knowledge about geography, geology
An illustrated guidebook that describes forty-nine natural places in Pennsylvania to explore and enjoy. In this sequel to the popular guidebook Outbound Journey
Guide to 65 natural areas Lake Erie, Allegheny National Forest, Pittsburgh region, Laurel Highlands > This companion for ecotourists points out western Pennsylv