Or you can take the George Washington Memorial Parkway (faster). From the Beltway, take the GW Pkwy south (follow signs to Mount Vernon) to Collingwood Road (this is actually the same road as Parker mentioned above. Turn right onto Collingwood, go approximately 1.5 miles to Apple Hill Road and turn left. The rest is the same as above.

From Points South of the Beltway
Head north on I-95 and exit to US Highway 1 (Richmond Highway). Continue on Highway 1 for about 10 miles to Sherwood Hall Lane (Hwy 626). Turn right onto Sherwood Hall Lane. At the 2nd traffic light (0.5 mile), turn right onto Parkers Lane (Hwy 628). Take Parker past the Mt. Vernon Inova Hospital and turn right onto Apple Hill Road. Take Apple Hill - it dead-ends onto Chancery Court. Turn left onto Chancery Court and we're the second house on the left.