Neptunia is a resort town of the Costa de Oro in the Canelones Department of southern Uruguay. The resort is located on the Ruta Interbalnearia, about 36 kilometres northeast of the border with Montevideo Department. It borders the resort Pinamar-Pinepark to the east and the resort El Pinar of the Ciudad de la Costa to the west, ac…Neptunia is a resort town of the Costa de Oro in the Canelones Department of southern Uruguay. The resort is located on the Ruta Interbalnearia, about 36 kilometres northeast of the border with Montevideo Department. It borders the resort Pinamar-Pinepark to the east and the resort El Pinar of the Ciudad de la Costa to the west, across the stream Creek Pando.