Tui is the entry point to Spain for pilgrims walking the Camino Portugués — the Portuguese Way to Santiago de Compostela. The old town's main square and the streets around the cathedral are on the official route, marked with the yellow arrows and scallop shells that guide pilgrims throughout the Camino network.
Watching pilgrims pass through the town — tired, purposeful, often surprisingly cheerful — is part of the texture of Tui daily life. The town has a pilgrim hostel and several cafés that cater specifically to walkers. If you're interested in doing a section of the Camino, Tui is an excellent starting point: the walk north to Porriño and beyond passes through pleasant Galician countryside and rural villages that the main tourist circuit misses entirely.