Iberia's Natural Border

The Tagus creates a natural border between Spain and Portugal — but instead of dividing the two countries, the river brings them together at its banks. The Tagus creates a natural border between Spain and Portugal — but instead of dividing the two countries, the river brings them together at its banks. The Tagus creates a natural border between Spain and Portugal — but instead of dividing the two countries, the river brings them together at its banks. The Tagus creates a natural border between Spain and Portugal — but instead of dividing the two countries, the river brings them together at its banks.