Saturday: 10h - 12h30, 13h30 - 17h30
Sunday: 10h - 12h30, 13h30 - 17h30
Saturday: 10h, 11h, 13h30, 14h30, 15h30, 16h30
Sunday: 10h, 11h, 13h30, 14h30, 15h30, 16h30
No reservation required; first-come, first-served
Maximum 20 people per visit
Built under the rule of King João V, the construction of the Águas Livres Aqueduct started in 1731, in what was to become the first system water supply in the city of Lisbon. Extending over 58 km, it crosses the Alcântara Valley by means of 35 monumental stone arches spanning 941 meters, with the largest rising 65 meters high and 32 meters wide. Retired from the supply system in 1967, the Aqueduct is one of Portugal’s most remarkable works of hydraulic engineering.