Yes. An iron bridge completed in the 1880s links Valença to Tui just across the Minho, and the short crossing gives the best panoramic view of Valença's walls. It means one day trip covers two countries and two historic towns.
Valença sits about 112 km (70 miles) from Porto, 116 km (72 miles) from Santiago de Compostela, and 38 km (24 miles) from Vigo. Its position right on the border makes it a natural stop whether you're traveling within Portugal or across into Spain.
Three to four hours is enough to walk the ramparts, explore the old town, and step across to Tui for the view back at the walls. Because a private transfer runs on your schedule rather than a fixed departure time, you can linger at the fortifications or head out early without watching a clock.
Start with the Roman milestone marking the XLII mile of the Braga-Tui road, still standing where it was placed centuries ago. The Romanesque Church of St. Mary, with its later baroque additions, sits nearby, and a walk along the bastions shows exactly how the defenses were built to withstand attack. Wandering the old town's stone streets rounds out the visit.
Valença is a fortified border town on the Minho river, ringed by star-shaped 17th-century ramparts that once repelled both Spanish and French sieges. Inside the walls, cobbled lanes wind past 12th-century houses and a Roman milestone marking the old Braga-Tui road. It's a rare chance to walk an intact military fortress and a living town in the same afternoon.
As a small border town, Valença isn't well served by direct trains or frequent buses from Porto or Galicia, often meaning transfers or long waits. A private transfer takes you door to door in one straight ride, with a driver who can also add a stop in Tui without extra planning on your part.