Tracys Landing is an unincorporated community in Anne Arundel County, Maryland. Tracy's Landing Tobacco House No. 2 was listed on the National Register of Historic Places in 1982. The St. James Church was listed on the National Register of Historic Places in 1972. Most of the County's borders are defined by water. To the east lies the western shore of the Chesapeake Bay, and numerous tidal tributaries of the Bay indent the shoreline, the various rivers, creeks, streams, inlets forming prominent peninsulas, also known as "necks" (as further south in Virginia). The largest of these tributaries include (from north to south), the Magothy River, Severn River, South River, and the West River. Further south, the upper Patuxent River forms the border of Anne Arundel with Prince George's County to the west. Deep Run forms part of the northwestern border with Howard County, and Lyons Creek forms part of the southern border with Calvert County. Anne Arundel County originally included all of the land between the Patuxent River and the Patapsco River (mainstem and South Branch) upstream to their headwaters on Parr's Ridge. The northwestern section of this long tract later became Howard County, with the border between the two running very close to the Atlantic Seaboard fall line. As a result, Anne Arundel County lies almost entirely within the Atlantic Coastal Plain while Howard County is almost entirely within the Piedmont province. Elevations in Anne Arundel County range from sea level at the Chesapeake and tidal tributaries to approximately 300 feet in western areas near the fall line. The terrain is mostly flat or gently rolling, but more dramatic banks and bluffs can be found where waterways cut through areas of higher elevation.