Palmetto-Alligator Slough Preserve

Acquired in 1993, the 264.5-acre tract sits in an unincorporated pocket of Dallas County near Seagoville. The water system spans Parson's Slough, four ponds, and three wetlands named for former open space administrator Mary Phinney, where stands of Sabal minor take root. The land remains entirely undeveloped: it is not currently open to the public and has no amenities.