Parque Nacional da Peneda-Gerês - Sao Joao do Campo

From the Sao Joao do Campo entrance, 17km/10mi northeast of Terras do Bouro, you can either drive southeast along the narrow, winding little road to Caldas do Gerês, or take the old Roman road. This was built between A.D. 79 and 353, and runs along the southeast side of the Vilarinho reservoir up to the Portela do Homem on the Spanish frontier. It has the largest number of original Roman milestones on the Iberian peninsula.