The ancient Guaraní roots beneath the mist of the world's largest waterfall system

Countries & Cities · Published 29 September 2026 Swipe more like this →

In short: Spanning 677 square kilometers in northern Argentina, Iguazú National Park is far more than a scenic wonder. While famous for its massive, U-shaped river and subtropical jungle, the region holds a deep human history, from ancient hunter-gatherers to the colonial era, all preserved within a vital biodiversity corridor.

The land now known as Iguazú National Park has been occupied for at least 10,000 years, beginning with the hunter-gatherers of the Eldoradense culture. By 1,000 CE, these groups were displaced by the Guaraní people, who introduced advanced agricultural practices to the region. The Guaraní legacy remains embedded in the landscape today; the very name of the park and its river is derived from the Guaraní words y guasu, meaning large water. European presence began in 1542 with the arrival of explorer Álvar Núñez Cabeza de Vaca, followed by the establishment of Jesuit missions in 1609.

Formally established in 1934, the park was created to safeguard the spectacular Iguazu Falls and the surrounding subtropical jungle. In 1970, law 18.801 carved out the Iguazú National Reserve from the park's western section. This distinction is crucial: while the national park prioritizes minimal human interference, the reserve permits infrastructure, such as the international airport and various tourist hotels. In 1984, UNESCO recognized the site as a World Heritage Site, acknowledging its status alongside its Brazilian counterpart, the Iguaçu National Park.

Today, the park serves as a critical component of the proposed Trinational Biodiversity Corridor, which seeks to link conservation units across Argentina, Brazil, and Paraguay within the Alto Paraná Atlantic forests ecoregion. The park's dense vegetation, including the 40-metre-high palo rosa and the ceibo, provides a sanctuary for rare and threatened species. Visitors may encounter jaguars, harpy eagles, and the vinaceous amazon, a bird distinguished by its unique wine-colored plumage. By protecting these habitats, the park maintains a fragile balance between its rich historical heritage and the urgent ecological needs of the Upper Paraná ecoregion.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• Argentina's oldest national park hides a legendary monster and a secret nuclear project.
• The Great Water: How Misiones Became a Crossroads of Nature and Colonial History
• The enduring legacy of the Guarani people, from Jesuit missions to modern national identity
• A reversed-J of basalt is Earth’s largest waterfall system
• Inside the Indonesian volcano where miners harvest neon blue fire for a living
• Can a fragile Tunisian wetland survive the unintended consequences of human engineering projects?
• The Arctic glacier that calves twenty billion tonnes of ice into the sea annually
• A Renaissance masterpiece built entirely of stone without a single drop of mortar
• The Imam Husayn Shrine in Iraq is the site of the world's largest pilgrimage
• How a Croatian coastal town became the world's first city with electric street lights
• The massive sanctuary where empires collided and millions find peace
• A World Heritage Site caught in a battle over an unauthorized building expansion

More in World Heritage Sites · More in Countries & Cities · Latest · A–Z · All topics