Working from offices in Logroño (La Rioja, Spain) and Santa Fe (Argentina), Atelier Atántico – Inter – won the competition to build an interpretation center, along with an auditorium, for the Raúl Uranga – Carlos Sylvestre Begnis subfluvial tunnel. Located within a new urban park, the center would showcase this 1969 work of engineering that connects the cities of Paraná and Santa Fe.

The winning scheme presented two independent concrete buildings standing on the edge of the site, evoking the architectural concepts of the door and the threshold. Creating four walls defined the interior voids. Through the repetition of walls and beams, the near-identical two constructions adapted to the topography and existing vegetation. For money reasons, only the interpretation center has gone up. The auditorium has to wait for funding.