Iguazu Falls National Park

There is no single Iguazu Falls National Park. There are two of them, in two countries, created five years apart, inscribed by UNESCO two years apart and run by different agencies with different tickets and different hours.

Two national parks, one waterfall

The Iguazú River forms the border between Misiones province in Argentina and Paraná state in Brazil, and the falls sit on it. Each country protected its own bank, and the two protected areas have never been merged. Between them they hold about 250,000 hectares of Atlantic Forest, which is the largest remaining block of that forest anywhere.

Parque Nacional Iguazú — Argentina, 1934

Argentina's park was created in 1934 and protects 67,698 hectares of Selva Paranense in the Iguazú department of Misiones. It is administered by the Administración de Parques Nacionales, whose superintendency sits at Victoria Aguirre 66 in Puerto Iguazu, 17 kilometres from the gate. The visitor area — the Área Cataratas — is run under concession, which is why the ticket, the train and the walkways are managed as one operation.

Beyond the falls themselves, the park is recognised as an Area of Importance for Bird Conservation, and it runs the country's best-known jaguar work from a dedicated interpretation space inside the visitor area.

Parque Nacional do Iguaçu — Brazil, 1939

Brazil's park was created on 10 January 1939 by Decreto-Lei 1.035, signed by Getúlio Vargas, and covers 185,262 hectares — nearly three times the Argentine side. It is administered by ICMBio, the federal biodiversity institute, with visitation run by the Urbia+Cataratas concession since 2023.

Its trail network reaches well beyond the falls: the Caminho do Poço Preto runs nine kilometres into the forest, open for walking from 09:00 to 12:00 and cycling until 15:00, and the Caminho das Bananeiras drops 2.6 kilometres to the riverbank at Espaço Taupá. Both are covered by the same ticket as the Trilha das Cataratas.

What UNESCO inscribed, and when

The Argentine park was inscribed on the World Heritage List in 1984 and the Brazilian park in 1986, as two separate natural properties rather than one transboundary site. The inscription describes a semicircular waterfall some 80 metres high and 2,700 metres across, made up of 275 cascades on a basaltic line spanning the border.

It also names what lives around it: a subtropical rainforest with more than 2,000 species of vascular plant, and tapir, giant anteater, howler monkey, ocelot, jaguar and caiman among the fauna. That list is the reason the wildlife page exists.

Who runs the visit: APN, ICMBio and two concessions

The authorities

APN in Argentina and ICMBio in Brazil own the decisions that matter to a visitor: whether a circuit is open, what the safety protocol is, and when a walkway comes down. The August 2026 decision to dismantle the Argentine Devil's Throat walkway was theirs, not an operator's.

The concessions

Iguazú Argentina runs the Área Cataratas services, including the Tren Ecológico, and publishes the Argentine tariff. Urbia+Cataratas runs visitation on the Brazilian side, publishes that tariff and issues the park's own notices — including the one that closed its walkway at 13:00 on 11 September 2026.

What that means for you

Two authorities means two sets of announcements, in two languages, on two websites. No tour operator controls either, and none can reopen a circuit. Check the park, not the operator, on the morning you go.

The New7Wonders vote of 2011

On 11 November 2011 Iguazu was named one of the New7Wonders of Nature in a global public vote. It is not a UNESCO designation and it confers no protection, but both parks use it in their own material and it is the reason you will see "Seven Wonders" on half the signage in Foz do Iguaçu.

How many people come, and from where

The Brazilian park publishes monthly visitor numbers, and 2026 has broken its records twice. July 2026 brought 263,150 people, the busiest month in the park's history; August 2026 brought 174,005, the busiest August.

The pattern is worth knowing before you pick a date: this is overwhelmingly a domestic and regional destination, and the busiest weeks are Brazilian and Argentine school holidays rather than the northern summer.

Conservation: the jaguar, the forest and the river

The forest

The two parks together hold the largest surviving block of Atlantic Forest, a biome reduced to a fraction of its original range. Everything else here depends on it, including the flow of the river.

The jaguar

The yaguareté is the species the Argentine park is best known for protecting, and the visitor area carries an interpretation space built around it. You will not see one; the population is small and nocturnal, and the walkways are the busiest part of the park.

The river

Flow is managed by nobody. The Iguazú River rose above 8.4 million litres a second in September 2026 against a historical mean near 1.5 million, and the parks responded by taking infrastructure out of the water rather than by restricting it. That is the conservation decision a visitor is most likely to notice.

Practical detail for each side sits on the Argentine side and the Brazilian side, and the hours and admissions for both are on plan your visit. The Iguazu Falls guided tours that enter one park or both are compared at Iguazu Falls Tours.

Sources

• Iguazú Argentina — tarifas (Argentine admission and parking, read 13 September 2026)
• Iguazú Argentina — horarios y consejos (Argentine hours and train timetable)
• The Brazilian park — 2026 ticket prices (effective 19 December 2025)
• The Brazilian park — passarela notice, 11 September 2026
• Administración de Parques Nacionales — the Argentine park
• UNESCO World Heritage — the Argentine inscription

Prices and opening times change. Verify both parks before you travel.