Parque Termal Federación

Parque Termal Federación in Entre Ríos province, Argentina, is a landmark in the history of South American thermal tourism: when the town of Federación was submerged by the Salto Grande hydroelectric reservoir in the 1970s, an entirely new town was built nearby and the thermal spring tapped from the Guaraní Aquifer beneath it became the centrepiece of the rebuilt community, transformed into a major thermal tourism park that today draws hundreds of thousands of visitors annually. The sulphate- and sodium-rich Guaraní water at around 43°C feeds an impressive outdoor thermal complex that has made Federación one of the premier thermal destinations in Argentina. The town's origin story — a community forced to reinvent itself after displacement — and its subsequent success as a thermal resort town represent a remarkable chapter in Argentine social and tourism history.