The Aqueduto das Águas Livres (Free Waters Aqueduct) was opened in 1748 to supply drinking water to Lisbon.
The aqueduct is a system that collects and transports water using gravity. The chosen trajectory for Lisbon’s aqueduct was that of the old Roman aqueduct.
Stretching for almost 60km (37mi), it survived the earthquake of 1755, and only stopped supplying water for human consumption in the 1960s.
It is possible to walk across a section of the aqueduct of about 1km over 35 arches, though you may need a head for heights.
How to get to Lisbon’s aqueduct
The walkable section of the aqueduct is accessed off a quiet residential street through a small park in Campolide. It may be a bit hard to find.
Take bus 702 from Praça Marquês do Pombal, direction Serafina, using your Viva Viagem card. Get off at stop Calçada dos Mestres (if in doubt, ask the driver for the aqueduct). Walk about 120m to the aqueduct entrance and ticket office.
For ease, take a taxi.
Calçada da Quintinha 6, open Tuesday to Sunday from 10am to 5.30pm, www.epal.pt