Tarifa is a small town on the southernmost point (Punta Tarifa, Punta Marroqui) of continental Europe, situated on the Strait of Gibraltar across from Morocco. It was used as a lookout for shipping entering and leaving the Strait.
Coordinates: 30°0'55.1"N, 5°36'20.4"W
Mr. Midshipman Hornblower: The Spanish Galleys.
Tarifa in Wikipedia