Wikipedia: "The Águas Livres Aqueduct (Portuguese: Aqueduto das Águas Livres, pronounced [ɐkɨˈdutu dɐʃ ˈaɡwɐʃ ˈlivɾɨʃ], "Aqueduct of the Free Waters") is a historic aqueduct in the city of Lisbon, Portugal. It is one of the most remarkable examples of 18th-century Portuguese engineering. The main course of the aqueduct covers 18 km, but the whole network of canals extends through nearly 58 km.
The Mãe d'Água (Mother of the Water) reservoir of the Amoreiras, the largest of the water reservoirs, was finished in 1834. This reservoir, with a capacity of 5,500 m³ of water, was designed by Carlos Mardel. It is now deactivated and can be visited as part of the Museu da Água (Water Museum)."
Capital, largest, and wealthiest city in Portugal and one of the leading economic centers on the Iberian Peninsula. Although located in the westernmost corner of Europe, the city is firmly embedded in the European Union, hosting a couple of EU agencies. Visit Baixa, the downtown city center and Alfama, the oldest district in the city or just chill out in one of Lisbon’s memorable parks – Parque Florestal de Monsanto, one of Europe’s largest urban parks or Parque Eduardo Vll, off the main drag. Last but not least, Lisbon plays host each September to the Lisbon Gay & Lesbian Film Festival - Queer Lisboa.