You reach the city by the west through farms, and by the east, passing through agricultural settlements, such as Colony Jose Felix Lopez, "Puentesiño" and Paso Bravo National Park.

The Fortress of San Carlos was built in 1796 by order of Governor of Paraguay, Don Joaquin de Alos y Bru, years after the founding of the Villa Real de la Concepcion, on a small hill a few metres from the Apa River, with the aim of defending the region against the advance of bandits and Mbayaés Indians allied with the conquerors from Brazil.

The Governor sent the commander of Villa Real de Concepción, Don Luis Bernardo Ramirez on an expedition to establish a fort on the banks of River Apa.

It is a sign of the presence of Spaniards since late 1700 and the government of José Gaspar Rodríguez de Francia.

The Caxoeira hills in Brazil, and the Cerro Paiva, Paraguay, complement the beautiful landscape next to River Apa.