Vapor Cué National Park, National park in Cordillera Department, Paraguay

Vapor Cué National Park, 4 km from Caraguatay in Cordillera Department, covers 54 hectares along the Yhaguy River. Its collection holds hulls and boilers of six Paraguayan navy vessels scuttled in 1869; only two metal hulls survive, including the iron-hulled Anhambaí and the boiler of the Piraveve. A long dark cylindrical tank rests on a concrete and steel platform, with a large red spoked wheel above its left end, smaller red wheels behind, and a tall gray smokestack with a dark red band near the center.

In 1869, during the War of the Triple Alliance, the Paraguayan squadron entered the Manduvirá and Yhaguy rivers to escape the Brazilian fleet. The crews scuttled or burned the vessels near Caraguatay on 18 August 1869. Recovery began in 1978 with Operation Vapor Cué, which diverted the Yhaguy through a one-kilometre auxiliary canal to expose the hulls.

The park preserves remains of Paraguayan warships that tell the story of a crucial moment in the nation's defense. Visitors can see how these vessels still stand as symbols of past military determination along the riverbank.

The site can be reached by paved road from the capital, making it fairly accessible for day trips. The grounds are open to visitors year-round, though rainy months may affect walking conditions around the vessels.

To recover the wrecked ships, workers dug an auxiliary canal that temporarily diverted the river's flow. This engineering effort allowed them to pull the vessels from the water and display them on dry land.