From the walkway over the river.
W. Bulach — CC BY-SA 4.0 · Dennis G. Jarvis — CC BY-SA 2.0 · Dennis G. Jarvis — CC BY-SA 2.0 · Luca Galuzzi (Lucag) — CC BY-SA 2.5
Iguaçu Falls is the largest waterfall system in the world, on the Iguaçu River at the border of Brazil and Argentina. Its edge runs about 2.7 kilometres, split by islands into 150 to 300 separate falls depending on the water level, 60 to 82 metres high, and about half the river pours into a narrow chasm called the Devil's Throat, some 80 to 90 metres wide. The name comes from the Guarani for big water. Most of the falls lie on the Argentine side, which is why the Brazilian side gives the full panorama. Park buses take visitors from the visitor centre to the start of the Falls Trail, a path of about 1.2 kilometres that looks out over one fall after another and ends on a walkway over the river facing the Devil's Throat, where the spray soaks everyone standing on it. The park was created in 1939 and listed by UNESCO as a World Heritage Site in 1986. Bring a rain jacket and a cover for your phone and camera, and do not feed the coatis that come up to visitors on the trail: they snatch food and can bite. The Macuco Safari boat trip to the foot of the falls costs extra.
From the walkway over the river.
About 1.2 km of views.
The Argentine side before you.
Iguaçu National Park, Rodovia das Cataratas
The Brazilian side gives the full panorama in half a day; the Argentine side takes you closer on longer walkways and needs a full day. With time, see both.