Iguazú Falls — The Garganta del Diablo — Full Guide (Argentina)

Overview

Iguazú is the largest waterfall system on earth by average flow — 275 separate falls crash across a 2.7 km front where the Iguazú river plunges into the Paraná basin, wrapped in subtropical jungle and permanent rainbows. The heart of the spectacle is the Garganta del Diablo (Devil's Throat), a U-shaped chasm where the river's volume funnels into a single furious curtain.

The Argentine side is the definitive experience: two loop circuits of walkways suspended over the water plus the jungle train to the Devil's Throat balcony, and the Gran Aventura boat ride that drives under the falls. Plan one full day on the circuits, a half day for the boat or the Brazilian side, and expect to get soaked and delighted in equal measure.

The circuits: Upper and Lower

The park's two walkway loops are the backbone of the day. The Upper Circuit (Circuito Superior) runs along the river's top edge, giving sweeping views over the fall line and the islands; it is flatter and drier, a good first stop.

The Lower Circuit (Circuito Inferior) descends into the spray zone, threading between the bases of the falls and smaller viewpoints at water level. Coatis patrol both loops with the confidence of small carnivores — watch your backpack. Allow three hours for the two circuits together, plus the train rides.

The Garganta del Diablo

The Devil's Throat is the crescendo. The jungle train from the main station runs a small green line to the balcony walkway, a 1.1 km causeway of metal decking over the river that ends at a rail directly above the chasm's edge. The water below falls 80 m into permanent mist; on sunny mornings a full double rainbow forms in the spray.

Go at opening time — the causeway is where every visitor converges, and the morning light is also the best for photos. The view from the balcony is the single image most travelers take home from Argentina.

The Gran Aventura boat ride

The region's most famous adrenaline add-on: a speedboat takes you upriver, then pilots straight under the falls of the Iguazú river canyon. You will be soaked to the skin — that is the point, and the point is glorious. Dry bags for cameras are provided. It runs year-round; in the high-water summer months the approach is even more dramatic.

The Brazilian side

Foz do Iguaçu, across the border, offers the panorama the Argentine side cannot: one long cliff-hugging walkway facing the entire curtain of falls from across the gorge, ending in a glass-floored balcony at the Devil's Throat. It is a half-day add-on — bring your passport for the border hop and, if you have the time, both sides make a magnificent pair.

Practical tips

• Book park entry online in advance in high season — the gate queues are real.
• The Gran Aventura and both circuits are doable in one long day; two days is the relaxed version.
• Rain does not ruin the falls — it amplifies them. Rainbows after rain are the best.
• Wear quick-dry clothes and secure sandals; the walkways are wet and slippery.
• Stay in Puerto Iguazú, 18 km from the gate, and use the town's green buses to the entrance.