The three major waterfalls in the world are Niagara Falls, Victoria Falls, and Iguazu Falls.

- Niagara Falls is situated on the Niagara River, straddling the border between Canada and the United States. The river's Goat Island divides the falls into two main sections, with the larger portion known as Horseshoe Falls.

- Victoria Falls is found along the middle stretch of the Zambezi River in Africa, marking the border between Zambia and Zimbabwe.

- Iguazu Falls is situated on the Iguazu River, which forms the boundary between Argentina and Brazil.

<b>Niagara Falls</b>

Niagara Falls, situated in the heart of the Niagara River along the border of Canada and the United States, is renowned as one of the seven wonders of the world. Its grandeur and vast volumes of water vapor never fail to astonish visitors. The name "Niagara Falls" can also be translated as "Thundering Waters" or "Great Water." There are two main ways to experience Niagara Falls: by taking the "Maid of the Mist" boat tour or by enjoying an aerial view from a plane, albeit the latter option tends to be more expensive.

Originating from Lake Erie, the Niagara River cascades over a sudden 51-meter vertical drop, creating a spectacular sight resembling a cascade of stars. The thunderous roar of the falls can be heard from miles away, underscoring the awe-inspiring nature of the scene. Niagara Falls consists of two primary waterfalls: the American Falls and the world-famous Horseshoe Falls.

The Niagara River straddles the border between the U.S. state of New York and the Canadian province of Ontario.

It is a waterway connecting Lake Erie and Lake Ontario. The river meanders and twists, starting from Buffalo, New York, USA in the south to the town of Younger, Ontario, Canada in the north, with a total length of only 54 kilometers, yet the elevation drops from 174 meters straight down to 75 meters.

<b>Victoria Falls</b>

Victoria Falls is located in the middle reaches of the Zambezi River in Africa, Zambia, and Zimbabwe border.

The waterfall is more than 1700 meters wide, the highest point 108 meters, width and height of Niagara Falls are twice as large. The average annual flow rate is about 934 cubic meters per second.

Zambezi River to the waterfall before the gentle flow, and the waterfall falls sound like thunder, residents called "Mosi Otunya" (meaning "thunderbolt of fog"). The water of Victoria Falls cascades into a gorge that varies in width from 25 to 75 meters.

Victoria Falls is divided into five sections: East Falls, Rainbow Falls (where the canyon is the deepest), Devil's Falls, the crescent-shaped Horseshoe Falls, and the Main Falls (60-100 meters high).

Located at the westernmost point is the "Devil's Falls", the most imposing of the Devil's Falls, which falls straight down into the abyss with the force of a mountain.

<b>Iguazu Falls</b>

Iguazu Falls is located on the Iguazu River on the border of Argentina and Brazil.

It is a horseshoe-shaped waterfall, 82 meters high and 4 kilometers wide, four times the width of Niagara Falls, and much wider than Victoria Falls.

The cliff's edge is lined with rocky, tree-lined islands, allowing the Iguazu River to fall in about 275 rapids or cascades, ranging from 60 to 82 m.

During the rainy season from November to March, the maximum flow of the falls can reach 12,750 m3/s, with an annual average of about 1,756 m3/s. Coordinates:25 degrees 41 minutes south latitude, 54 degrees 26 minutes west longitude

The water flows forward steeply into a canyon, and the river plunges straight down the top and sides of the inverted U-shaped canyon.

It separates the two countries from north to south, suddenly turning a bend of 90 degrees, flowing east. The bend is so big that the terrain to the east has no continuity and is a large section lower, so there is this unforgettable waterfall.

The falls span two countries are set aside in their respective national parks, and are visited by two million tourists a year from Argentina or Brazil.

"Iguazu" means "big water" in the language of the Guarani people, the indigenous people of South America.