🇧🇷 Brazil · South
There are few natural spectacles in the world that leave you as speechless as the Iguazú Falls. In the heart of the Atlantic forest, on the border between Brazil and Argentina, the Iguazú river plunges along almost three kilometres of front in a set of more than 270 falls, crowned by the imposing Garganta del Diablo. Foz do Iguaçu is the Brazilian gateway to this wonder: from here you reach the Parque Nacional do Iguaçu, a UNESCO World Heritage Site since 1986, where a walkway leads into the roaring heart of the falls, wrapped in mist and rainbows.
But Foz is much more than the falls. It's a vibrant, mixed border city where three countries meet —Brazil, Argentina and Paraguay— and dozens of communities from all over the world live side by side. A few minutes from the park are the Parque das Aves, unique in Latin America, where you walk inside aviaries among toucans and macaws; the colossal Itaipú Binacional dam, one of the greatest engineering works on the planet; and the Marco das Três Fronteiras, the obelisk where Brazil, Argentina and Paraguay look at each other across the Iguazú and Paraná rivers.
This guide covers the essentials of Foz do Iguaçu with a practical, warm eye: how to visit the falls on the Brazilian side (and how to combine them with the Argentine side), how to reach the Parque das Aves and Itaipú, how to move between the three countries, when to go depending on flow and weather, and how to organise your days so you don't miss anything. Iguazú is one of those places that, once seen, you never forget: it's worth planning properly so you can enjoy it fully.
Long before the Europeans, the Iguazú river region was inhabited by Guaraní peoples, who gave the place its name: 'Iguazú' (or 'Iguaçu') comes from the Guaraní 'y' (water) and 'guasú' (big), that is, 'big water'. The first European to sight the falls was, according to tradition, the Spanish conquistador Álvar Núñez Cabeza de Vaca, in 1542, during his expedition from the Atlantic coast towards Asunción; he named them the 'Saltos de Santa María'. For centuries the area was the territory of the Guaraní Jesuit missions and later the subject of border disputes between the Spanish and Portuguese crowns. The city of Foz do Iguaçu was officially founded in 1914 (on a military colony established in 1889 to secure the border). In the 20th century, two milestones transformed the region: the creation of the Parque Nacional do Iguaçu in 1939 —one of the first in Brazil—, declared a UNESCO World Heritage Site in 1986; and the building, between 1975 and 1982, of the Itaipú Binacional dam on the Paraná river, a joint Brazil-Paraguay mega-project that multiplied the city's population and turned it into a major tourism and energy hub. The full story is on our history page.
Read the full history ↓The southern state of araucaria pine forests and great waters: from the Jesuit missions of Guairá razed by the bandeirantes to the gold of Paranaguá, from yerba mate and the tropeiros to European immigration and the coffee of the north. Home to the Iguazú Falls, to Itaipú and to Curitiba, a world benchmark in urban planning.
Read the history of Paraná →No exact prices: a scale from $ (budget) to $$$$$ (luxury), with 2-3 options per category.
Origins, formation and what the sources say.
Long before travel guides ran out of superlatives to describe the Iguazú Falls, the Guaraní had already solved the problem with two words: 'y', which means 'water', and 'guasú', which means 'big'. 'Iguazú' —written 'Iguaçu' in Portuguese— means, simply, 'big water': a name as plain as it is accurate for the formidable set of more than 270 falls with which the river plunges into the forest, and proof that those who lived in this region centuries before the Europeans arrived knew it —and named it— better than anyone.
The Brazilian city that grew opposite the river's mouth on the Paraná took the name 'Foz do Iguaçu', where 'foz' means precisely 'mouth' of a river in Portuguese. So the full place name can be read as 'the mouth of the big water': the place where the river of the great waters joins the Paraná.
For the Guaraní, the river and its falls weren't just a geographical feature but a space loaded with meaning and stories. The Guaraní legends about the origin of the falls —which have reached us in various versions— are part of the region's intangible heritage and sit alongside the scientific explanation of the falls, which are the result of ancient basaltic lava flows that formed the steps down which the river now pitches.
Before any European presence, the region of the Iguazú river and the Triple Frontier was inhabited by Guaraní-speaking peoples, who lived from hunting, fishing, gathering and growing cassava and maize in the subtropical forest. The river, the falls and the forest were part of their territory and of their symbolic world, shot through with stories and beliefs about the origin of the waters.
According to historical tradition, the first European to sight the falls was the Spanish conquistador and explorer Álvar Núñez Cabeza de Vaca, in 1542. Cabeza de Vaca, who had been appointed adelantado of the Río de la Plata, was making an overland expedition from the Atlantic coast (in today's Santa Catarina, Brazil) towards Asunción, in the heart of Guaraní territory, when his party came upon the river's imposing falls. Amazed, he named them the 'Saltos de Santa María', though that name didn't last against the Guaraní 'Iguazú'.
Through the 16th and 17th centuries, the region fell within the sphere of the Guaraní Jesuit missions, the vast system of reductions the Society of Jesus established in the Paraná basin to evangelise and organise the Indigenous population. The area was also the setting for tensions and territorial disputes between the Spanish and Portuguese crowns, whose boundaries in this part of South America would only be settled much later.
For most of the 19th century, the Iguazú river region remained a remote, thinly populated frontier, covered in forest and far from the centres of power. Defining the boundaries between Brazil, Argentina and Paraguay in this area was a long process, shaped by the War of the Triple Alliance (1864-1870) against Paraguay and by successive border agreements and arbitrations at the end of the 19th century.
To assert Brazilian sovereignty in this far west, the Brazilian army established a military colony in the area in 1889, known as the Colônia Militar do Iguaçu. Its mission was to occupy, watch over and populate the border, in a territory where until then small groups working in yerba mate and timber extraction predominated, many of them of Paraguayan and Argentine origin. That military post was the seed of the future city.
Over time, the settlement grew around the colony and around border trade. On 10 June 1914 the municipality of Vila Iguaçu was officially created, and shortly afterwards it was renamed Foz do Iguaçu. Through the first decades of the 20th century, the city grew slowly as a border crossing point and the centre of a farming and forestry region, still far from the great push that would come later with falls tourism and, above all, with the building of the Itaipú dam.
As the 20th century advanced, the Iguazú Falls gained international fame as one of the natural wonders of South America, and with it grew the awareness that both the falls and the vast expanse of Atlantic forest around them needed protecting. That forest, the Mata Atlântica, is one of the richest and at the same time most threatened biomes on the planet, home to species such as the jaguar (onça-pintada), the tapir, the yaguareté and an immense variety of birds.
In 1939 the Brazilian government created the Parque Nacional do Iguaçu, one of Brazil's first national parks, with the aim of preserving the set of falls on the Brazilian side and a vast area of forest. On the Argentine side, the Parque Nacional Iguazú had been created a few years earlier, in 1934. Together, the two parks make up one of the largest protected remnants of inland Atlantic forest on the continent, and they form a vital corridor for the region's wildlife.
Worldwide recognition came in 1986, when UNESCO inscribed the Parque Nacional do Iguaçu (Brazil) on the World Heritage list for its exceptional natural value; the neighbouring Argentine park had already been inscribed in 1984. The listing enshrined the falls and their forest surroundings as heritage belonging to all humanity, and reinforced the commitment to conservation against pressures such as deforestation, poaching and unchecked development. Today the park is the most visited in Brazil and a model of nature tourism.
If the falls made Foz do Iguaçu famous, it was an engineering project that completely changed its scale and its economy: the Itaipú Binacional dam. In 1973, Brazil and Paraguay signed the Itaipú Treaty, under which the two countries agreed to jointly exploit the enormous hydroelectric potential of the Paraná river, which marks the border between them. It was an unprecedented project: a power plant shared, in equal parts, by two nations.
Work began in 1975 and continued into the early 1980s, in one of the largest engineering undertakings in the world. Construction meant diverting the course of the Paraná, raising a dam some 8 kilometres long and creating a gigantic reservoir. The project drew tens of thousands of workers from all over Brazil and Paraguay, which sent the population of Foz do Iguaçu soaring within a few years, turning a relatively small border town into a large multicultural urban centre. The plant came online in 1984 and, for decades, was the world's biggest producer of hydroelectric power (until it was overtaken in annual output by China's Three Gorges dam, though Itaipú held on to historic generation records).
Building Itaipú also had social and environmental costs. Filling the reservoir flooded vast areas, among them the celebrated Guairá Falls (Sete Quedas), a set of cascades that many considered as impressive as those at Iguazú and which were submerged forever beneath the lake. The filling also forced communities to be relocated. Even so, Itaipú turned Foz into a first-rate energy, tourism and economic hub, and the dam itself —with its visitor circuits— became one of the region's great attractions.
Today's Foz do Iguaçu is a city deeply shaped by its status as a triple border. Within a few kilometres lie three countries —Brazil, Argentina and Paraguay— linked by two great bridges: the Tancredo Neves Bridge, over the Iguazú river, joining Foz with Puerto Iguazú (Argentina), and the Friendship Bridge, over the Paraná river, joining it with Ciudad del Este (Paraguay). The Marco das Três Fronteiras, at the confluence of the two rivers, symbolises that meeting of nations.
The Itaipú boom and tourism brought communities from the most diverse parts of the planet to Foz. Today the city is home to substantial Arab (above all Lebanese and Syrian-Lebanese), Chinese, Paraguayan, Argentine, paranaense, gaúcho and many other communities, which shows in its food, its places of worship —from a large mosque to one of the biggest Buddhist temples in Latin America— and its daily life. That mix makes Foz one of the most cosmopolitan and plural cities in Brazil.
Economically, the city rests on three great pillars: nature tourism (the falls, the National Park, the Parque das Aves), the Itaipú energy hub and intense border trade, fed by the constant flow of shoppers towards Ciudad del Este. Foz do Iguaçu has thus established itself as one of the leading tourist destinations in Brazil and the Southern Cone: a place where the most imposing nature, the most colossal engineering and the most vibrant cultural diversity live side by side in one corner of the continent, on the banks of the 'big water'.