Rock Springs Nature Preserve is the southernmost conservancy site in Lancaster County, straddling Mason-Dixon Road.
More than 400 species of butterflies and moths – more than anywhere in Pennsylvania – live on 173 acres that also feature serpentine stone, a waxy green stone created by geologic pressure millions of years ago.
More than 100 species of wildflowers grow in abundance on the site every spring. The serpentine aster, which blooms only in Pennsylvania and Maryland, grows here and is a candidate for federal protection. More than 60 species of native grasses turn the landscape a brilliant shade of gold every fall. But summer is the best season for bird watchers to listen for bobwhites and whippoor-wills.
Restrictions: No bikes, alcohol, hunting, fishing, camping or fires. Pets must be leashed.