To complete the new work, MacKay walked, cycled, and explored nearly 80 trails in local state, county, and city parks, as well as area watersheds. Discover Hemlock Gorge, a small slice of Appalachia transported into northern Baltimore County, with its timeless peace and ancient gnarled hemlocks; or Black Marsh, with birds soaring overhead or skulking among the vegetation of the pristine freshwater wetlands; or the unique landscape of Soldiers Delight Natural Environment Area, which shelters more than 38 rare plant species.