Portugal
Roman baths still steam beside a bridge Trajan built — thermal water hot for two millennia.
Steam rises from the thermal springs in the centre of Chaves, curling past the Roman bridge that has spanned the Tâmega since Trajan's engineers finished it. The water surfaces at 73 degrees, carrying the same minerals that drew legionaries here to heal, while across the river the old town stacks up in layers of granite and colour.
Chaves is one of Portugal's oldest continuously inhabited spa towns — Roman Aquae Flaviae, its waters documented since the first century. Trajan's bridge, completed around 104 AD and among Iberia's best preserved, still carries pedestrians over the river with original milestones standing at its ends. The fourteenth-century keep houses the military museum, the streets around it layer Romanesque through Baroque, and the town still channels the same geothermal source the Romans tapped — mineral water in something close to two thousand years of continuous therapeutic use. The upper Tâmega basin feeds the town's other fame: PDO presunto cured in the mountain air, and pastéis de Chaves, flaky veal-filled parcels protected by law and properly made only here.
Solo
The springs, the compact old town and the frontier atmosphere make an ideal solo base for the remote Trás-os-Montes — unhurried pace, hearty food, and a Roman bridge that alone justifies the journey north.
Couple
Roman history paired with thermal relaxation as few European spa towns manage — mornings across Trajan's bridge, afternoons in thermal water, evenings sharing warm pastéis.
Family
Thermal water, a fourteenth-century keep and a walkable town that fills two or three days deep in Portugal's north.
Pastéis de Chaves — flaky pastry parcels of seasoned veal, best eaten warm.
Presunto from the surrounding hills and river trout grilled simply with garlic.

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