Cataratas del Iguazu and the forest of waterfalls
Published on 08/15/2026 at 14:43 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Cataratas del Iguazu, known in English as Iguazu Falls, forms a vast curtain of waterfalls along the Iguazu River between Foz do Iguacu in Brazil and Misiones Province in Argentina. Set on the Paraná Plateau, this system of cataracts drops from a basalt tableland into a deep canyon, creating one of South America’s most dramatic encounters between rock and water in the twentieth-century national parks of Iguaçu and Iguazú.
A river at the meeting points of countries and parks
The Iguazu River flows westward across the Paraná Plateau and then breaks into hundreds of separate waterfalls where it meets a line of basalt cliffs at the border between Brazil and Argentina. The main front of Cataratas del Iguazu extends for roughly 2,700 m (8,860 ft), with the falls divided between Iguaçu National Park in Paraná State and Iguazú National Park in Misiones Province.extends for roughly 2,700 m The canyon below carries the river towards its confluence with the Paraná River, where Brazil, Argentina and Paraguay meet.
On the Argentine side, Cataratas del Iguazu lies within Iguazú National Park, which was inscribed on the UNESCO World Heritage List in 1984 for the outstanding natural spectacle of its waterfalls and subtropical forest.inscribed on the UNESCO World Heritage List in 1984 Across the river, Iguaçu National Park in Brazil was recognised as a World Heritage property in 2001, creating a protected corridor that spans both sides of the gorge.World Heritage property in 2001
Basalt, canyon and the making of an amphitheatre of water
The landscape of Cataratas del Iguazu is rooted in a huge volcanic episode during the Lower Cretaceous, when flood basalts of the Serra Geral Formation spread across southern South America.flood basalts of the Serra Geral Formation These dark, fine-grained lavas built a plateau hundreds of metres thick, later cut by rivers that exploited fractures in the rock to carve valleys and gorges. At Iguazu the basalt forms a resistant cap rock, underlain by softer sedimentary layers which erode more rapidly.
Where the Iguazu River reaches this step in the plateau, water plunges over the basalt lip and gradually pulls the edge upstream, leaving a narrow canyon below. The falls complex has been described as a three-layer structure: a hard basalt rim, a middle zone where erosion undercuts the cliff and sculpts columns and ledges, and lower impact pools where turbulent water meets the riverbed.three-layer structure The result is a broad amphitheatre of cascades broken by islands, rock towers and inlets, rather than a single continuous drop.
Devil’s Throat and the many cataracts of Iguazu
The most striking feature within Cataratas del Iguazu is Garganta del Diablo, the Devil’s Throat, a U-shaped chasm where a large share of the river converges into one section of the gorge. Measurements vary slightly between sources, but the chasm is consistently described as around 150 m (492 ft) wide, several hundred metres long and about 82 m (269 ft) high.around 150 m wideabout 82 m high Here, multiple cataracts pour into a confined space, throwing up persistent spray and framing the gorge with vertical curtains of water.
Across the whole front, Cataratas del Iguazu consists of well over two hundred individual waterfalls and rapids distributed along the basalt edge.set of 275 falls Some falls are narrow and direct, others fan out over stepped ledges, and many are separated by patches of forest growing on the plateau and islands. The constant interaction between flow, rock and vegetation gives the scene a layered character, with water, basalt and greenery interlocking along the canyon.
Visiting Cataratas del Iguazu: what travellers from Western Europe should know
- Cataratas del Iguazu lies along the Iguazu River between Puerto Iguazú in Misiones Province in Argentina and Foz do Iguacu in Paraná State in Brazil, reached by road from both towns.
- The viewpoints and walkways on both sides of the falls stand above a deep basalt canyon, and visiting involves walking on constructed paths with sections exposed to spray and humid subtropical forest.
- The falls sit within Iguazú National Park in Argentina and Iguaçu National Park in Brazil; the official language is Spanish in Argentina and Portuguese in Brazil, 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 on the Iguazu River at the border between Misiones Province in Argentina and Paraná State in Brazil, near Puerto Iguazú and Foz do Iguacu.
What can visitors expect when visiting the falls?
Visitors encounter a wide front of waterfalls dropping from a basalt plateau into a canyon, reached by built walkways and viewpoints on both the Argentine and Brazilian sides inside protected national parks.
What makes Cataratas del Iguazu distinctive among waterfalls?
The falls combine a very long waterfall front, hundreds of individual cataracts and the focal chasm of Garganta del Diablo, where a high drop concentrates much of the Iguazu River’s flow into a single gorge.
