Caños de Carmona

The Caños de Carmona are the remains of a Roman aqueduct 17.5 kilometres long, later rebuilt by the Almohads, which connected the cities of Carmona and Seville, and which was fully operational until its demolition in 1912.It was primary constructed from bricks, and consisted of approximately 400 arches standing on pillars, with additional upper arcade sections in some places. It is believed to be the only example of this type of Roman construction in Spain.

Source: Wikipedia