From I-81 take exit 14. 
*Traveling South on I-81 turn right off ramp.
*Traveling North on I-81 stay in right lane off ramp.
Follow signs straight ahead toward Hwy 11 (also known as Lee Hwy.) 
Road ends at stop light.  Turn right at stop light onto Hwy 11. 
Go the stop light #7.  Turn left onto Hwy. 19 (also known as Bluefield Hwy or Porterfield Hwy)
Go to next stop light and turn right onto Russell Road.
The Falls Plaza is located on your left.

From Lebanon, Va. traveling into Abingdon on Porterfield Hwy. (Hwy 19) turn left at traffic light past Worthington Way and Crabtree property. 
The Falls Plaza building is on your left.