Segovia Aqueduct - 4T Avenida Fernández Ladreda, Segovia, Spain

This beautiful piece of architecture dates back to around the 1st or 2nd century AD and is among the best preserved testaments to the skills of ancient Rome. Not only is the aqueduct so well-preserved, it continued to supply water to the city of Segovia from the Frio River well into the 20th century.