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Iguazu waterfalls are waterfalls of the iguazu river on the border of the Argentine province of Misiones and the brazilian state of ParanáThe Iguazu River rises near the city of Curitiba. For most of its course, the river flows through Brazil; however, most of the falls are on the Argentine side. Below its confluence with the San Antonio River, the Iguazu River forms the boundary between Argentina and Brazil.

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The Iguazu Falls are located where the Iguazu River tumbles over the edge of the Paraná Plateau, 23 kilometres (14 mi) upriver from the Iguazu's confluence with the Paraná River. Numerous islands along the 2.7-kilometre-long (1.7 mi) edge divide the falls into many separate waterfalls and cataracts, varying between 60 and 82 m (197 and 269 ft) high. The number of these smaller waterfalls fluctuates from 150 to 300, depending on the water level. About half of the river's flow falls into a long and narrow chasm called the Devil's Throat(Garganta del Diablo in Spanish or Garganta do Diabo in Portuguese).

The Devil's Throat canyon is 80-90 wide and 70-80 m deep. Left of this canyon, another part of the river forms 160-200 individual falls, which merge into a single front during flood stage. The largest falls are named San Martín, Adam and Eva, Penoni, and Bergano.

About 900 m (2,950 ft) of the 2.7 km (1.7 mi) length does not have water flowing over it. The water of the lower Iguazu collects in a canyon that drains into the Paraná River, a short distance downstream from the Itaipu Dam. The junction of the water flows marks the border between Brazil, Argentina, and Paraguay. Some points in the cities of Foz do Iguaçu, Brazil, Puerto Iguazú, Argentina, and Ciudad del Este, Paraguay, have access to the Iguazu River, where the borders of all three nations may be seen, a popular tourist attraction for visitors to the three cities.

THE GEOGRAPHIC OF THE IGUAZU FALLS

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CAPYBARA

You can’t tell how huge it is from the photo, but the capybara weighs 140 pounds and can be over 4 feet tall. Think black bear-sized guinea pig. This one was scavenging near Garganta del Diablo (the Devil’s Throat), one of the biggest waterfalls in the park.

capybra

SPECTACLED CAIMAN

This caiman — complete with a butterfly on his head — was lounging on a rock not far from the capybara.

Caiman

COATI

It may look cute and innocent, but there were signs throughout the park warning visitors to hide food in the presence of coati, this raccoon relative, because they’ve been known to attack for food. So unlike the folks in this photo, I kept my distance from coatis and their sloth-like claws.

Coati

TOUCAN

Not the best shot of a toucan, but they don’t stay still for long! You can see its beak pointing toward the bottom of the photo. This isn’t a toco toucan (think Toucan Sam), though we did see a few of those fly by as well. But they were too fast to snap a picture.

Toucan

GIANT ANTS

I have to admit I was a little bit afraid this very large ant would somehow leap off the ground and bite my hand. But it didn’t and now you can see how huge these ants are. I figure if a normal ant can carry a large leaf on its back, this one can probably carry a small child.

Giant Ant

BUTTERFLIES

I’d never seen so many butterflies in my life. They were everywhere — in blue, pink, green, solids, patterns — swarming around us as we stepped onto new paths. One even landed on my head and stayed there for a full minute before moving on.

Butterflies

PLUMBEOUS KITE

I used a super-zoom lens for this shot of a plumbeous kite, part of the hawk family.

Kite

VULTURE

There was a gigantic colony of vultures hanging out on a nearby rock, with dozens more circling in the sky. Eerie. Even scarier is the fact that this photo was captured without the help of a zoom lens.

Vulture

LIZARD

These 3 foot long reptiles proved they weren’t afraid of people as they sunned themselves near hiking paths. They looked intimidating, though, and we captured this shot with the zoom.

Lizard

RODENTS

I’m not sure what this is called, but it was about the size of a guinea pig and didn’t seem to be afraid of people.

Small Rodent

The second I learned is an agouti and was the size of a small beagle and was much more skittish. It ran across the trail far ahead of us.

Agouti

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Jet Boat Excursion - this thrilling joy ride cuts right through the turbulent rapids of the Río de Iguazú and right into the misty bottoms of Iguazú Falls itself. We took such a tour and it's pretty safe to say that you're going to get seriously drenched. Use the dry bag for those things you don't want to get drenched (especially electronics such as your camera). Your clothes will also get a serious soaking so we saw some people brought raincoats or waterproof clothing. Unfortunately for us, we had forgotten to wear them for our tour. Basically our cotton clothing got soaked through and given the humidity of the area, they never really dried off for the rest of the day we went touring. In any case, both the Brazil side and Argentina side run jet boat tours. We didn't do the jet boat tour on the Brazil side, but we can definitely say that on the Argentina side, we visited (i.e. practically went underneath) both the Three Musketeers waterfalls and the gushing Salto San Martín.

Helicopter Ride - this is not exactly the most environmentally friendly way to experience Iguazu Falls, but you do get a birds eye view of the immense falls. It's definitely something you're not going to see while walking the catwalks. Only the Brazil side offers these types of tours. Argentina doesn't run them because they feel helicopter noise disrupts the native wildlife of the region. When we did our walks, we definitely heard them (especially away from the noise of the falls like on the trail to Salto Arrechea.

Jungle Safaris - these types of tours are more for education and enlightenment as they take you through the subtropical rainforests of the National Park in a vehicle. A park ranger discusses various aspects of the ecosystem. You can book a tour that integrates this excursion with the exciting jet boat tour (as we had done on our trip).

Itaipu Dam - this controversial dam is the largest hydroelectric scheme in the world. Set between the border of Paraguay and Brazil along the Paraná River, a visit to this facility will really impress upon you the immensity and scale of the project.

Rappeling - adrenaline junkies take note! This excursion is basically one where you're tied to a rope and descend down a vertical cliff face on the Brazilian side of Iguazu Falls. At least you have an expert Brazilian tour guide rappeling down with you to both encourage you and to help you with your equipment.