Aqueduto das Águas Livres - view point

Interesting facts

1. 1

   The aqueduct system spans approximately 58 kilometers in total, though the most iconic section is the 941-meter crossing of the Alcântara valley.

2. 2

   Its central arch, which spans the valley floor, is one of the tallest stone arches in the world, measuring 65 meters high and 29 meters wide.

3. 3

   The structure was designed to be earthquake-resistant, which contributed to its survival during the devastating 1755 disaster.

4. 4

   The aqueduct was officially commissioned in 1731 and remained in operation until the late 1960s.

5. 5

   The stone used for construction was primarily Lisbon limestone, sourced from local quarries.

6. 6

   It served as a key water source for thousands of Lisbon households, feeding into the city's network of 'chafarizes' or public fountains.

Overview

The Aqueduto das Águas Livres is an 18th-century engineering marvel in Lisbon that spans the Alcântara valley. Built under King John V to supply water to Lisbon, the structure features 35 arches, with the highest point reaching 65 meters above the valley floor. Visitors can access the walking path on top of the aqueduct, providing a unique vantage point over the city's western industrial and residential zones. The stone structure survived the 1755 Lisbon earthquake intact, demonstrating its structural integrity. It is managed by the Water Museum (Museu da Água). The walkway crosses the valley, connecting the Campolide area to the Alcântara neighborhood.

Insider tips

• Wear comfortable, flat walking shoes, as the pathway consists of uneven stone surfaces.

• The walk across the aqueduct is exposed to direct sunlight and wind, so plan for weather protection accordingly.

• Ensure you check the official Water Museum website before departure, as specific sections may close for maintenance or during adverse weather conditions.