Aqueduto dos Pegões
In the 16th century, Filipe II of Spain became Filipe I of Portugal and also Master of the Order of Christ; to assure the supply of water to its headquarters in Tomar, he ordered a 6-km (4-mile) aqueduct built, with a total of 180 arches. They march right up to the walls of the Convent of Christ, but the most impressive portion, with two tiers of 58 arches, strides across the Vale dos Pegões valley, a 10-minute drive (or 50-minute walk) northwest of Tomar.