Embark on an exciting sightseeing adventure across some of Lisbon’s most daring sites: the Lisbon Aqueduct, Mãe de Água reservoir, and Loreto Gallery. Your adventure begins at the historic Lisbon Aqueduct, built in 1746 to provide the city with its first supply of clean drinking water. Known locally as the Aqueduto das Águas Livres, this remarkable structure is composed of 109 stone arches – the tallest stone arches in the world when they were built – and spans an impressive 36 miles (58 kilometers) in length. By far, the aqueduct’s most striking feature is the network of 14 arches that cross over the Alcântara Valley, the tallest of which rise to a spectacular 213 feet (65 meters) from the ground, with a span of 95 feet (29 meters). Today, you’ll have the incredible opportunity to walk the magnificent aqueduct, passing through the monumental arch of Alcântara Valley. After, you’ll visit the Mãe de Água reservoir. From this reservoir, water was gravity-fed without interruption to the various fountains around the city through a system of five principal galleries. The Loreto Gallery formed part of the system and provided water to several major fountains of Lisbon. An underground passage will lead you to a beautiful belvedere in S. Pedro de Alcântara. After admiring an impressive view, your guide will lead you on a scenic walk toward the Chiado area, a famous Lisbon neighborhood teeming with historic cafés and shops, and frequented by both artists and fashionistas alike. Here, you’ll enjoy free time to soak in the beauty and historic significance of the area, shop, or relax before returning to the port.