The Pit Stop BAR-B-Q is a gas station located somewhere outside Mystic Falls.
In True Lies, Jeremy, Matt and Katherine stopped here so that Katherine can visit the bathroom. Meanwhile Matt entered the store to by some aspirin for Katherine. Cashier saw Katherine when she tried to escape Matt and Jeremy. When he reached for the shotgun, Matt hit him with the butt of it. Jeremy managed to catch up with Katherine.
Later, Silas entered the gas station. He compelled the cashier to cut his wrist and pour the blood in the cup. Nadia and Gregor entered through a different door. Then Nadia sliced Gregor's throat saying that she never considered herself a part of The Travelers.