On the Argentine side of Iguazu, you do not simply look at the falls — you walk into them, above them, and to the very lip of their most violent drop. That experience is built around three distinct trails, and knowing how they fit together is the difference between a rushed half-day and a truly unforgettable visit. This guide breaks down the three Iguazu Falls circuits inside the Argentine national park — the Upper Circuit, the Lower Circuit, and the Devil’s Throat — along with the jungle train that connects them. You will find distances, walking times, difficulty and accessibility, what you actually see on each one, and a local’s plan for combining all three in a single day. Whether you are visiting for the first time or returning, this is everything you need to plan your day inside one of the seven natural wonders of the world.
By Pablo, Senior Travel Planner at 01Argentina Travel Agency
In this guide
- How the Argentine Side Is Organized
- The Upper Circuit (Circuito Superior)
- The Lower Circuit (Circuito Inferior)
- The Devil’s Throat (Garganta del Diablo)
- The Ecological Jungle Train
- How to Combine the Three Circuits in One Day
- Practical Tips for Walking the Circuits
How the Argentine Side Is Organized
The Argentine park holds roughly 80% of the Iguazu Falls, and its genius is that it lets you meet them from three completely different angles. The Upper Circuit runs along the top edge of the cascades, the Lower Circuit takes you down toward the river to feel their power from below, and the Devil’s Throat delivers you to a balcony above the single most spectacular drop of all. A free ecological train links the trailheads, so you move easily between them. Together the three circuits are why most visitors need a full day here — and why so many wish they had two. If you are still deciding how to split your time between countries, our comparison of the Argentine vs. Brazilian side of Iguazu is a useful starting point.
The Upper Circuit (Circuito Superior)
The Upper Circuit is the gentle one, and it is often the best place to begin. A flat network of elevated metal walkways carries you along the crest of the falls, so you look out over the edge as sheet after sheet of water tips into the gorge below. It is largely level and among the most accessible of the trails, making it comfortable for almost every visitor.
- Length: roughly 1.7 kilometers of walkways.
- Time: about 1 to 1.5 hours at a relaxed pace.
- Difficulty: easy and mostly flat, with good wheelchair access.
- Highlights: top-edge views of the Dos Hermanas, Bossetti, Adan y Eva, Bernabe Mendez, Mbigua and San Martin falls.
The perspective here is unique: rather than facing the falls, you stand where the river actually goes over the brink, watching rainbows form in the rising mist. It is the circuit that best captures the sheer scale of the system.
The Lower Circuit (Circuito Inferior)
If the Upper Circuit shows you the falls, the Lower Circuit lets you feel them. This trail descends toward the base of the cascades through the rainforest, bringing you close enough to be dusted with spray and to sense the ground trembling beneath the biggest drops. It is the most immersive of the three, and a favorite of returning visitors.
- Length: about 1.4 kilometers each way (roughly 2.9 kilometers round trip).
- Time: around 1.5 hours, longer if you linger.
- Difficulty: medium, with some steep staircases; about 70% is wheelchair accessible via an adapted alternative path.
- Highlights: the Lanusse, Alvar Nunez, Chico and Dos Hermanas falls, plus superb views across to the Bossetti and San Martin falls and the panorama toward the Devil’s Throat.
From the Lower Circuit you also reach the launch point for the free boat to San Martin Island when river levels allow, and it is the classic jumping-off point for the optional Gran Aventura speedboat ride that powers right up under the cascades. For a broader packing and timing checklist, our Iguazu Falls travel tips pair perfectly with this circuit.
The Devil’s Throat (Garganta del Diablo)
The Devil’s Throat is the climax of any visit — the moment every traveler remembers. To reach it, you ride the ecological train to the Garganta station and then follow a long series of catwalks that stretch across the calm, wide upper Iguazu River. There is no hint of what is coming until, suddenly, the whole river vanishes over the edge of a roaring, horseshoe-shaped chasm in a permanent cloud of mist and thunder.
- Length: around 1.1 kilometers of catwalk each way from the Garganta station.
- Time: about 1.5 to 2 hours including the train and time at the balcony.
- Difficulty: easy and flat along the walkways, with good accessibility.
- Highlights: the viewing balcony directly above the largest and most powerful fall, where great dusky swifts dart through the spray.
Because the balcony sits right over the drop, you will get wet — embrace it. On very high-water days the Devil’s Throat walkway can occasionally close for safety, so it is worth checking conditions on arrival and prioritizing it if the forecast is uncertain.
The Ecological Jungle Train
Tying the circuits together is the Tren Ecologico de la Selva, a quiet, open-sided train that glides through the rainforest at low speed. It runs between the Central station near the park entrance, the Cataratas station (the gateway to the Upper and Lower circuits), and the Garganta station for the Devil’s Throat. Rides are included with your park admission and depart at regular intervals, though queues build at peak times. The journey itself is part of the experience, offering a gentle immersion in the jungle and a good chance to spot birds and butterflies between walks.
How to Combine the Three Circuits in One Day
A full day is enough to enjoy all three circuits comfortably if you plan the order well. Here is the sequence we recommend most often to travelers:
- Arrive at opening time. Early entry means cooler temperatures, fewer people, and the best light and wildlife activity.
- Start with the Devil’s Throat. Take the train straight to the Garganta station first thing, before the largest crowds arrive at the park’s headline attraction.
- Return for the Upper Circuit. Ride back and walk the top-edge trail while you still have energy and good morning light.
- Finish with the Lower Circuit. Save the most immersive, staircase-heavy trail for last, and cool off in the spray during the warmer afternoon.
If you have the luxury of two days, splitting the circuits across two mornings makes for a wonderfully relaxed visit and gives you time for extras like the boat ride or a longer nature trail. Many visitors validate their ticket at the park office for a reduced second-day entry, so it is worth asking on your way out.
Practical Tips for Walking the Circuits
- Dress to get wet. Bring a light rain poncho and quick-dry clothing, especially for the Lower Circuit and the Devil’s Throat.
- Wear comfortable, non-slip shoes. The walkways can be damp and the Lower Circuit has steep stairs.
- Protect yourself from the sun and insects. Sunscreen, a hat, water, and repellent make the day far more pleasant.
- Mind your belongings and electronics. Spray reaches everywhere; a dry bag for your phone and camera is a smart move.
- Visit rain or shine. The circuits stay open in most weather, and a rainy day brings dramatic mist and thinner crowds.
- Watch the wildlife, but do not feed the coatis. These curious raccoon-like animals are everywhere and will investigate open food.
Timing your visit, arranging transfers from your hotel, and adding experiences like the boat ride are all far easier with a local team handling the details. Our Iguazu Falls tours from 01Argentina include park transfers and bilingual guiding so you can focus entirely on the spectacle.
Ready to Explore the Iguazu Circuits?
The Upper Circuit, the Lower Circuit, and the Devil’s Throat each reveal a different face of Iguazu, and together they make one of the most rewarding days of walking anywhere in the world. With a smart plan and the logistics handled, all you have to do is look up and take it in. Tell us your travel dates and we will help you build the perfect Iguazu visit.
Plan your visit to the falls with our local team and explore Iguazu Falls tours at www.01argentina.com — WhatsApp available for a fast response, typically within 24 hours.