Atlantic Coast Route
Spain's long Atlantic spine. From the Basque border at Irún along the Cantabrian and Galician coast, then south to the Portuguese border at Ayamonte — shadowing the Camino del Norte, with a Galicia branch out to Cape Fisterra. Coast and hills, rarely flat. Heads up: the Montoya tunnel between Endarlatsa and Zalain Zoko is closed, with a temporary diversion on the N-121A road.






