Cataratas del Iguazu, a vast crescent of water on the border
Published on 09/05/2026 at 18:33 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Cataratas del Iguazu, known in English as Iguazu Falls, form an immense series of waterfalls on the Iguazu River at the border between Argentina’s Misiones Province and Brazil’s Paraná State. The falls stretch along a wide basalt escarpment near Foz do Iguacu and are protected by Iguazú National Park in Argentina and Iguaçu National Park in Brazil, both recognised by UNESCO as World Heritage sites in the 1980s.UNESCO-listed national parks
Cataratas del Iguazu as a crescent-shaped waterfall system
The central fact about Cataratas del Iguazu is scale. Instead of a single drop, the Iguazu River breaks into a crescent of waterfalls spread across a front of about 2.7 km (1.7 miles).Elongated horseshoe plan Seen from above, the system forms a broad arc, with water spilling in separated curtains and compact chutes wherever the river meets the edge of the plateau.
The falls comprise around 275 individual cascades, separated by rocky and wooded islands that stand on the lip of the escarpment.Approximate number of waterfalls Water levels vary with the seasons, yet the structural relationship between river, islands and cliff remains constant, giving the system its characteristic broken profile. Heights along the line of waterfalls range roughly between 60 m and 82 m (197–269 ft), with some drops forming narrow vertical plumes while others fall in broader sheets.Height range and width
Basalt, river and the geography of the border
Geologically, Cataratas del Iguazu mark the point where the Iguazu River falls from the Paraná Plateau, a vast tableland built from basaltic lava flows of the Serra Geral Formation.Basalt escarpment and plateau These volcanic rocks, dating from the Cretaceous period, give the escarpment its dark colour and stepped profile. The river has cut down through this resistant rock, creating a narrow downstream gorge and leaving a vertical break where the waterfalls form.
The Iguazu River itself is a tributary of the Paraná River and acts as a natural boundary between Argentina and Brazil over much of its lower course.River and border relationship The main waterfall area lies roughly 23 km upstream of the Iguazu River’s confluence with the Paraná, in a region where Argentina, Brazil and Paraguay meet within a short radius. On the Argentine side, access runs through Puerto Iguazú in Misiones Province, while the Brazilian walkways and viewpoints are reached from Foz do Iguacu in Paraná State.Location and gateway cities
The Garganta del Diablo and the experience of the falls
Among the numerous waterfalls that make up Cataratas del Iguazu, the section known as Garganta del Diablo—the Devil’s Throat—is the most prominent single feature. Here, during higher flows, a large portion of the river plunges down one of the deepest drops in the system, reaching heights close to the upper end of the 60–82 m range.Devil’s Throat prominence The channel feeding this fall focuses the water into a narrower section of the escarpment, creating intense spray that rises from the gorge.
The broader setting around the waterfalls combines dense subtropical forest with open viewpoints along the cliff edge. Walkways and platforms on both sides of the border bring visitors close to individual drops and longer curtain-like sections, while also revealing how the river splits around islands before plunging into the canyon. From some vantage points, the crescent form of the system becomes clear, with lines of water stepping down in stages along the edge of the plateau.
Visiting Cataratas del Iguazu: what travellers from Western Europe should know
- Cataratas del Iguazu lie on the Iguazu River along the Brazil–Argentina border, reached via Puerto Iguazú in Argentina or Foz do Iguacu in Brazil, both with international airports.
- The falls occupy a subtropical landscape where walkways include sections over riverside rock and elevated paths above the gorge, with numerous steps and varied gradients.
- The surrounding terrain combines dense forest with exposed cliff edges and river viewpoints, so sturdy footwear and readiness for spray and humid conditions are important on the main routes.
- The official languages are Spanish on the Argentine side and Portuguese on the Brazilian side, and the currencies are the Argentine peso and the Brazilian real.
- Entry requirements depend on your nationality; UK travellers can check the FCDO travel advice at gov.uk/foreign-travel-advice, Irish travellers the Department of Foreign Affairs at ireland.ie.
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Frequently asked questions about Cataratas del Iguazu
Where are Cataratas del Iguazu located?
Cataratas del Iguazu are located on the Iguazu River at the border between Argentina’s Misiones Province and Brazil’s Paraná State, near the cities of Puerto Iguazú and Foz do Iguacu.
What can visitors expect on a visit to Cataratas del Iguazu?
Visitors encounter a wide arc of waterfalls divided into many separate cascades, with walkways, platforms and forest paths providing views into the gorge and across the river.
What makes Cataratas del Iguazu distinctive among large waterfalls?
The falls are distinctive for their crescent-shaped plan, the large number of individual waterfalls along a basalt escarpment and the binational protection by two adjacent national parks.
