Açude Velho, Historic reservoir in central Campina Grande, Paraíba, Brazil.

Açude Velho is a reservoir in central Campina Grande, Paraíba, formed by a long, even arc of water edged by a curved concrete retaining wall. Its broad top is a smooth light grey band divided by thin dark seams, with a brighter white face below; a narrow walkway of grey slabs runs along the outer side, and a low railing and row of palms line the far edge.

Built between 1829 and 1831 by the provincial government of Paraíba, Açude Velho was created in response to the drought that struck the Northeast region from 1824 to 1828, becoming the city's first reservoir.

The reservoir's shores feature monuments honoring the pioneers of Borborema, along with bronze statues of musicians Jackson do Pandeiro and Luiz Gonzaga, celebrating the musical heritage of northeastern Brazil.

A narrow walkway of grey slabs runs along the outer side of the curved retaining wall, whose smooth light-grey top is divided by thin dark seams. The wall arcs evenly around the water toward a low railing and a row of palms on the far edge. The reservoir sits in central Campina Grande, with the Museu de Arte Popular da Paraíba (MAPP) and the Museu Digital do SESI on its shores.

During the severe droughts of 1845 and 1877, the reservoir provided essential water not only to Campina Grande but also to other towns in the Borborema Plateau, sustaining thousands of residents.