The roar of the water is heard even before seeing anything. Then, moving along the metal walkways suspended above the Iguaçu River, the waterfalls appear one after another, like a curtain opening on 275 distinct drops of water, spread over almost three kilometers of the Paraná Plateau. When the sun descends towards the west and the light becomes orange and dense, each veil of water transforms into a natural prism: the rainbow is not an exception, it is the norm.
The Iguaçu National Park is located in the municipality of Foz do Iguaçu, in the Brazilian state of Paraná, at the border with Argentina and Paraguay. Established in 1939 and declared a UNESCO World Heritage Site in 1986, the park protects one of the most imposing waterfall systems on the planet. The most famous waterfall, the Garganta do Diabo — the Devil's Throat — is shared with the Argentine side and reaches a height of about 82 meters, producing a permanent cloud of water vapor visible from kilometers away.
Why sunset is the best time to visit
During the central hours of the day, the flat light flattens the depth of the waterfalls and the humid heat of the Atlantic forest becomes oppressive. But in the last two hours before the park closes — usually set at 5:00 PM or 6:00 PM depending on the season — something different happens. The slanting light of sunset strikes directly at the main waterfalls of the lower circuit, transforming the white foam into gold and copper. The elevated walkways, built directly over the water, allow you to position yourself just a few meters from the waterfall without any visual barrier: you are literally inside the scene.
Sunset rainbows are a recurring and physically explainable phenomenon: the micro-droplets of water in suspension act as prisms, and with the sun low on the horizon, the angle of refraction produces complete chromatic arcs, sometimes double. This is not photographic rhetoric: it is optics applied to the wild nature.
The lower circuit and the walkway over the Devil's Throat
The Brazilian side of the park mainly offers a panoramic view of the waterfalls from above, thanks to a circuit of about 1.2 kilometers with walkways that follow the edge of the cliff. The highlight is the platform overlooking the Garganta do Diabo: here the water falls with an average flow rate of about 1,500 cubic meters per second — a figure that varies greatly with the rainy seasons — and the noise is such that it makes any conversation at normal voice impossible. The humidity is total: in just a few minutes, you get wet as if under a shower.
Those who want to see the waterfalls from the inside, at water level, must move to the Argentine side, where the Iguazú National Park offers longer and more intricate circuits, including the walkway that leads directly to the upper edge of the Devil's Throat. The two parks are separated by the international border, but can be reached by local transport in less than an hour from Foz do Iguaçu.
How to get there and how much time to dedicate
The international airport of Foz do Iguaçu — Foz do Iguaçu/Cataratas International Airport, IATA code IGU — receives direct flights from São Paulo and Rio de Janeiro with high frequency. From the city center, public buses numbered 120 connect the central station to the park entrance in about 45 minutes, at a symbolic cost. Alternatively, taxis and ride-sharing apps cover the same route in 25-30 minutes.
To experience the sunset without rush, it is advisable to enter the park no later than 2:00 PM and walk the main circuit in the afternoon, keeping the best spots on the walkways for the last two hours of light. The entrance ticket to the Brazilian park is around 90-100 Brazilian reais for adult foreign visitors, but it is advisable to check the updated price on the official ICMBio website before leaving, as rates are reviewed periodically.
What to bring and what to expect
The water mist produced by the waterfalls is omnipresent: bringing a waterproof camera case is essential, not optional. Even in sunny weather, those approaching the front platforms will get completely wet. A change of shirt in the backpack is a simple but valuable precaution. Non-slip footwear is recommended because the metal walkways become slippery with constant moisture.
The park's wildlife is real and visible: coatis — South American raccoons with elongated snouts — frequent the park's rest areas and restaurants with a familiarity that can be surprising. They should not be fed, but it is hard to ignore them. At sunset, when visitors thin out towards the exit, some species of tropical birds become more visible along the paths that border the remaining Atlantic forest. Iguaçu at sunset is not just water: it is an ecosystem that changes color along with the sky.
