Four Corners, USA
The halfway point between Dallas, Texas and Warren, Ohio is in Centerville, Tennessee.
Washburn, TX is the halfway point.
Dallas
Nashville, TN
Amarillo, TX
Powderlick, OH.
1/2 is the halfway point
A rough estimate would be Amarillo, Texas.
TENNESEE
Waco!
Turrell, AR
a long way