Wednesday, 21 January 2026 - The day was spent exploring the Argentine side of Iguazú Falls, beginning with early-morning access to the Lower and Upper Circuits, with views of major waterfalls including Bossetti, San Martín, and Two Sisters. The afternoon focused on a visit to Devils Throat, observing its immense water volume, shifting rainbows, and surrounding wildlife.
Today I would stay on the Argentine side of the Iguazú River. I had already hiked the Upper Falls
trail, so I set out on the Lower Falls and then did the Upper Falls. Late in the afternoon
I linked up with my guide, and we spent 4 hours at the Devils Throat Falls.
The park opened at 0700 for guests of the hotel. I was walking at 0645. No one else on the trails.
Early morning Iguazú Falls - so pretty. First the Lower Circuit.
The water yesterday was up almost 40% to the prior day so more waterfalls. Today it looks
the same.
Alvar Nunez Falls - Alvar Nunez was the explorer who discovered Iguazú Falls in 1581.
Completely different pictures in the morning sun. Two days ago I was here in the afternoon.
The waterfalls making up most of the Argentine side of the river.
The roar of the waterfalls was a constant during the entire hike.
You can spot the observation walkway that is part of the Upper Circuit.
Beautiful single falls.
Bossetti Falls from the side.
Several first tier waterfalls feed into this second tier fall. The major first-tier waterfall
is San Martín Falls. The amount of water is hard to grasp.
A wider view with San Martín Falls on top then all that water funneled through the
small gorge.
The entire panorama of the falls in this section.
This could be Adam or Eve Falls.
One of the two waterfalls at the Two Sister Falls.
Both of the falls making up Two Sisters Falls
Two Sisters Falls is the last falls on the Lower Circuit.
Now I headed to the Upper Circuit.
The first view of the falls on the Upper Circuit.
The view keeps getting better.
Golden Silk Orb-weaver spider is an orb-weaving spider species that inhabits forests and
wooded areas ranging from the southern US to Argentina.
Looking down from on top of Bossetti Falls - I think Adam and Eve Falls are also in the picture.
The roar of the waterfalls was a constant during the entire hike.
The top of Bossetti Falls.
A window in the rocks is hard to see in the morning mist.
A black and white of the falls.
Morning light on the water
Massive amount of water tumbling through the falls.
The power of the falls creating a mist which shoot up as high as the falls itself.
Wider view of the water chute.
A video of the powerful waterfall.
A Golden Silk Orb-weaver spider, while venomous, their venom is generally not
considered harmful to humans.
A Black-capped Capuchin monkey.
Capuchins are known for their intelligence and are one of the few non-ape
primates observed using tools in the wild, such as cracking nuts with stones.
The end of the Upper Circuit headed back to the hotel for lunch.
We took a train to the start of the trail to the Devils Throat Falls. The trail is a raised
walkway of a mile to the falls.
An Iguazú Surubi Catfish is found in the Iguazú River near the famous falls and is
native to South America. They are the largest fish in the Iguazú River basin and can grow to 5 feet
and weigh over 220 pounds. It is considered an endangered species due to habitat changes
from dams and overfishing.
The Devils Throat Falls from the top. Over half the water in the Iguazú River goes over
this single waterfall.
The amount and volume of water is hard to imagine.
The waterfalls on the Brazilian side of the river. These do not appear to have a name on
any map.
The Brazilian falls in the mist.
A small break in the edge of the canyon creating a small waterfall.
This is the waterfall in the Devils Throat which might be called Union Falls. Half the Devils
Throat is in Argentina and half in Brazil.
The constant mist creates a rainbow which moves with the sun.
The sun went behind a cloud and the rainbow disappeared.
Massive amounts of water flowing into the Devils Throat.
Small waterfall on the edge of the main falls.
The end of the waterfalls are buried in the mist.
The smaller waterfalls on the Argentine side of the river.
I am a little fatigued after several hours at the Devils Throat.
As the sun lowers the rainbow rises.
The Devil's Throat looking into the Brazilian side.
The turtle is a Geoffroy's Side-necked turtle a freshwater turtle native to South America.
As a side-necked turtle, it cannot retract its head straight back into its shell;
instead, it tucks its long, flexible neck sideways under the edge of its shell.
On our way back to the train we ran into trouble, four young Coatis on the raised walkway.
Adorable, they jumped into some trees as we grew closer.
An adult Coati who was watching the younger ones approaches us on the walkway railing. By the time we
got to the Coati it also jumped into the trees.
Another great day at Iguazú Falls. Back at the hotel I ate dinner, Argentine steak, while watching
the sun set on Floriano Falls.
The last day of a great trip. The next day I began the flight back to Virginia Ann and Riley.