Santiago de Compostela's cathedral has sheltered the remains of Saint James the Apostle since the ninth century, when King Alfonso II of Asturias ordered construction over the discovery site. The current Romanesque structure, begun in 1075 under Bishop Diego Peláez and completed in 1211, stands at the terminus of every Camino de Santiago route, its twin Baroque towers rising seventy-four metres above Praza do Obradoiro. Over twelve million pilgrims and visitors pass through its triple-naved interior each year, many to embrace the Tree of Jesse column or descend into the silver casket crypt. The Pórtico da Gloria, Master Mateo's polychrome masterwork from 1188, remains the most intact Romanesque sculptural program in Europe, its two hundred granite figures depicting the heavenly court with forensic detail. Valença do Minho, thirty kilometres northwest across the Rio Minho, occupies a star-shaped seventeenth-century fortress that has guarded Portugal's northern frontier since the Restoration Wars. The double-walled fortification, completed under Vauban-influenced military engineering in 1641, encloses a medieval town whose granite arcades shelter linen merchants and goldsmiths within sight of Spanish Galicia. The ramparts stretch two kilometres, punctuated by six bastions and two gates, their design replicated from Dutch siege-resistance models imported during the Iberian Union period. A day trip from Porto to Santiago de Compostela and Valença bridges one hundred forty kilometres of the Minho valley, crossing landscapes that shift from the granite uplands of the Peneda-Gerês massif to the tidal plain where the Minho meets the Atlantic. The route follows the ancient pilgrimage corridor that linked Porto's Sé Cathedral to Santiago's shrine, a path walked by medieval penitents who carried scallop shells and relied on monastic hospitality. Modern highways compress the journey into ninety minutes, yet the terrain's sudden transition from Portuguese pine groves to Galician eucalyptus stands marks the same threshold pilgrims recognized by dialect shift and currency change. The UNESCO World Heritage inscription of Santiago's Old Town in 1985 recognized not only the cathedral's architecture but the urban fabric shaped by centuries of religious commerce. Rúa do Franco and Rúa da Raíña preserve the medieval street grid where hospices, taverns, and silversmiths served arriving pilgrims, their granite façades unchanged since the Codex Calixtinus documented the route in 1140. Valença's fortified perimeter, less visited but equally intact, offers a Portuguese counterpoint to Santiago's sacred grandeur, its military pragmatism contrasting with the cathedral's transcendent ambition.