Iguazu Falls sits on the border between Argentina and Brazil, where the Iguazu River drops off the edge of the Paraná Plateau in a crescent of around 275 separate cascades spread across 2.7 kilometres. It is roughly 80 meters high at the tallest point and, by flow, the largest waterfall system in the world. Both national parks around it are UNESCO World Heritage sites, protecting one of the last remaining fragments of Atlantic rainforest.
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Here is the thing every guide mentions and nobody quite conveys.
YOU WILL GET WET.
Not damp. Not slightly misted. Soaked to the skin, through a poncho, in the space of ninety seconds at the Devil's Throat walkway and again at Salto Bosetti, and again if you take the boat. The falls generate a permanent cloud of spray that drifts hundreds of meters and falls like heavy rain on a windless, cloudless day. Rain jackets do not cope with it because the water arrives from below and sideways as well as above.
The visitors who enjoy Iguazu most are the ones who accepted this before arriving and packed accordingly: quick-dry clothes, a waterproof bag for anything electronic, sandals rather than shoes, and a complete spare set of clothes left in the locker.
What Getting Wet Actually Requires
The dry bag is the single most important item
Phones die at Iguazu every single day. A Dry Bag Waterproof Bag ($20) is not a precaution here, it is the item without which you lose your camera. Put the phone, camera, passport and money inside it and close it properly before you walk out onto the Devil's Throat catwalk, not when the spray starts.
Ziplock bags work as a backup and tear. A proper roll-top dry bag does not.
Ponchos help and do not solve it
Ponchos are sold at both parks for a few dollars and they keep your torso dry for about a minute at the Devil's Throat. They are worth having, mostly to protect a bag, and they will not keep you dry. Buy one there rather than carrying one; they are cheap and the disposable ones tear.
Dress to be soaked, not to stay dry
This is the mental shift. Quick-dry synthetic or merino, nothing cotton, nothing that becomes transparent when wet, and sandals with straps rather than shoes that will stay wet for two days in tropical humidity.
Leave a spare set in the locker
Both parks have paid lockers near the entrance. A complete dry change of clothes waiting for you at the end of the day is the difference between a good evening and a clammy one.
Recommended Tours and Experiences
Argentine Side First, Then Brazilian
The order matters and there is a real reason for it.
The Argentine side: 80 percent of the falls, and you are in them
Parque Nacional Iguazú holds most of the cascades and puts you among them on a network of catwalks and trails. You need a full day, and it is not a viewing platform, it is a walking day.
The Upper Circuit, about 1.7 kilometres, runs along the top of the falls looking down.
The Lower Circuit, about 1.4 kilometres with a lot of steps, takes you to the base and to Salto Bosetti, where you get properly wet.
The Devil's Throat, the Garganta del Diablo, is reached by the park's narrow-gauge train and then a long catwalk across the river to a platform at the lip of the largest single cascade, where roughly half the river's flow drops into a canyon you cannot see the bottom of because of the spray. This is the most intense thing at Iguazu and the wettest place in the park by a wide margin. The noise is physical.
The Gran Aventura boat, extra cost, takes you directly under the falls and is a deliberate soaking. Everything you carry gets wet, including inside the drybags they provide, so leave what you can in the lockers.
Isla San Martín, when the river level allows, is a free boat and a steep climb to a viewpoint in the middle of the falls.
The Brazilian side: the panorama
Parque Nacional do Iguaçu gives you the view of the whole crescent from the front, which the Argentine side cannot, and it is where the photographs come from. A single main walkway of about 1.5 kilometres, reached by park bus, ending at a platform below the Floriano falls that is the other soaking point.
Half a day is enough.
Why this order
The Argentine side is immersive: you are on top of, beside and underneath individual cascades, wet and deafened, without ever seeing the whole thing. The Brazilian side then shows you what you were standing in. Doing it the other way round means the panorama comes first and the detail feels like a subset of it.
Both parks are separate countries, so you cross an international border between them. Check visa requirements for both Argentina and Brazil for your nationality before you book, and be aware that a same-day round trip still requires the stamps.
The Iguazu Packing List
Base layers
Two Roman Trail Women's Merino Wool Base Layers ($49-59) in long sleeve. Merino is the right fibre for a place where you will be soaked and then in 32-degree humidity: at 17.5 micron it keeps its shape wet, dries faster than cotton, does not become transparent, and does not develop a smell after a day of sweat and river water. The long sleeve is also sun protection on the exposed catwalks and mosquito cover in the forest.
A second set matters more here than anywhere, because one will always be drying.
Rain and sun
A Marmot Women's PreCip Eco Rain Jacket ($110), which is useful for actual rain, of which there is a great deal, and largely irrelevant against the spray, where a cheap poncho bought at the gate does the same job.
A wide-brimmed sun hat with a chin strap, since the Upper Circuit and the Brazilian walkway are fully exposed, this is the subtropics, and the updraught off the falls will take an unsecured hat over the edge.
Footwear, and why sandals
ELETON Barefoot Hiking and Water Shoes ($23.99), or any strapped sandal with grip. This is the correct choice at Iguazu and it goes against instinct.
Closed shoes will be soaked within an hour and will not dry overnight in this humidity, which means two days of wet feet and blisters. The catwalks are wet metal and stone, so you need grip and straps rather than flip flops, which will slip and come off.
Bring one pair of trainers for the town and the forest trails, and keep them dry.
The Darn Tough Women's Hiker Micro Crew Merino Socks ($28), two pairs, for the trainers and the evening.
The wet-day kit
The dry bag, as above. A quick-dry towel. A swimsuit worn under your clothes on boat day, which is what most people end up doing. A complete change of clothes for the locker. A plastic bag for the wet ones.
Insects and health
DEET Insect Repellent Spray ($12), reapplied, because it washes off constantly here. This is Atlantic rainforest: mosquitoes in the forest sections and at dusk, and dengue is present in both Misiones province and Paraná state.
Yellow fever vaccination is recommended for this region by both Argentine and Brazilian health authorities and is required for onward travel to some countries. Check current requirements well before you travel, since the vaccine needs ten days to take effect.
Two litres of water capacity, rehydration salts, and sunscreen reapplied after every soaking.
Organisation
The Eagle Creek Pack-It Cube Set ($59), with one cube designated for wet clothes, which on this trip is in constant use.
The Coatis: A Real Warning
This is not a charming aside. Coatis are the main animal problem at Iguazu and the reason both parks post warnings in four languages.
The South American coati is a long-nosed relative of the raccoon, about the size of a cat, and there are hundreds of them along the walkways on both sides. Decades of being fed by visitors has made them entirely fearless and food-focused.
What they do: approach in groups, climb on tables, and take food directly out of a bag or a hand. They have long claws and sharp teeth, and they bite and scratch people every day, mostly people holding a sandwich. A bite means a hospital visit and rabies risk assessment.
What to do:
Do not carry visible food on the walkways. Keep snacks inside a closed bag, ideally the dry bag.
Eat only in the designated enclosed food areas, which exist for this reason.
Do not feed them, ever, including "just a crisp". It is prohibited, it is why the problem exists, and human food kills them slowly.
Do not try to take a selfie with one. This is how a large share of the bites happen.
If a group surrounds you, walk calmly away rather than standing still with a bag they can smell.
The other wildlife is a pleasure: toucans, hundreds of butterfly species, capuchin monkeys, caimans in the calmer water, and if you are extraordinarily lucky a glimpse of the jaguars that still live in the park.
When to Go
March to May and August to October are the best windows. 20 to 28 degrees, manageable humidity, good water flow, fewer crowds.
December to February is high summer: 30 to 38 degrees with heavy humidity, afternoon thunderstorms, and the Argentine and Brazilian holiday season, which means the walkways are crowded and the Devil's Throat catwalk becomes a queue.
June and July are cooler at 15 to 24 degrees and pleasant, with lower water in a dry year.
Water levels vary enormously and unpredictably. Very high water after heavy upstream rain can close the Devil's Throat catwalk and suspend the boats, which happens several times a year. Very low water in a drought reduces the spectacle. Neither is predictable more than a week out, which is an argument for allowing two days rather than one.
What Not to Bring
Anything cotton. It will be wet for the duration of your trip.
Closed shoes as your only footwear. They will not dry.
A phone without waterproof protection. The most common loss at Iguazu.
Visible food on the walkways. See above.
A drone. Prohibited in both national parks.
Anything white. Wet and thin is not the combination you want.
An expectation of doing both sides in one day. It is technically possible and it wastes both.
Essential Resources for Women at Iguazu Falls
Emergency numbers, Argentine side: 911 generally, with 101 police, 107 ambulance, 100 fire. The town is Puerto Iguazú in Misiones province.
Emergency numbers, Brazilian side: 190 for police, 192 for ambulance, 193 for fire. The city is Foz do Iguaçu in Paraná state.
Park emergencies: both parks have ranger stations and first aid posts near the entrances and along the main circuits, and both have procedures for evacuating injured visitors from the walkways. Report a coati bite or scratch to a ranger immediately rather than at the end of the day, because the rabies assessment is time-sensitive.
Tourist police: Argentina runs a tourist assistance line on 0800 999 2838. Brazil operates a dedicated tourist police unit, the Delegacia de Atendimento ao Turista, in Foz do Iguaçu, which is the place to report theft in English or Spanish.
US consular services: the US Embassy in Buenos Aires covers the Argentine side, at ar.usembassy.gov. The US Consulate General in São Paulo covers Paraná state on the Brazilian side, with the embassy in Brasília, at br.usembassy.gov. Neither has a post at the falls.
Hospitals: Hospital Samic in Puerto Iguazú handles emergencies on the Argentine side. Hospital Ministro Costa Cavalcanti in Foz do Iguaçu is the larger and better-equipped facility on the Brazilian side and is where serious cases from either side often end up. Both countries treat emergencies in public hospitals regardless of nationality; private care requires payment or an insurance guarantee up front.
Official health authorities: the Argentine Ministry of Health at argentina.gob.ar/salud and the Brazilian Ministry of Health at gov.br/saude. Check yellow fever and dengue guidance for both before travel.
Official tourism authorities and park information: argentina.travel and the park at iguazuargentina.com; visitbrasil.com and the Brazilian park at cataratasdoiguacu.com.br. Both park sites publish current water levels and catwalk closures, which is worth checking the morning you go.
US State Department travel advisories: Argentina and Brazil, the latter with region-specific notes worth reading.
UK FCDO travel advice: Argentina and Brazil, including entry requirements for both, which differ by nationality and which you need for a same-day border crossing.
Solo women safety assessment: Iguazu is a straightforward destination for a woman travelling alone. Both parks are busy, well staffed and heavily supervised, the walkways are populated all day, and joining a tour or a shared transfer is easy. The genuine hazards are not human. Wet metal catwalks are slippery and the steps on the Lower Circuit are numerous; a strapped sandal with grip is a safety item rather than a comfort one. Coatis bite people every day, so keep food out of sight and report any scratch to a ranger immediately. Heat and humidity cause more visitor problems than anything else, so drink far more than feels necessary. On the towns: Puerto Iguazú is small, calm and safe to walk in the evening. Foz do Iguaçu is a much larger Brazilian border city with ordinary urban crime, and the areas around the bus terminal and the bridge to Paraguay are worth avoiding on foot after dark; use apps or hotel transfers rather than walking, and carry a copy of your passport rather than the original when moving between the two towns. Ciudad del Este in Paraguay, a short hop across the other bridge, is a duty-free market town with a considerably higher crime rate and is not somewhere to wander alone.
Reading On
Iguazu is worth two days and one of the few places that justifies crossing a border twice. The Argentina travel guide for women and the Brazil travel guide for women cover both countries, with Buenos Aires and Rio de Janeiro the usual connections at either end. For the other extreme of Argentine landscape, the Bariloche travel guide for women covers the Patagonian lakes. The Iguazu travel guide for women goes deeper on both parks. For why merino handles being soaked and then sitting in 32-degree humidity better than cotton, the merino wool base layer guide explains the fibre, and the full collection is at Roman Trail women's merino base layers.
If the outer journey is calling you, the inner one usually is too. Explore SoulMap at romantrail.com/blogs/soulmap.
