Taller than Niagara Falls, twice as wide with 275 cascades spread in a horseshoe shape over nearly two miles of the Iguaçu River, Iguaçu Falls are the result of a volcanic eruption which left a large crack in the earth. A visit is a jaw-dropping, visceral experience, and the power and noise of the cascades live forever in the memory. Along with Nahuel Huapi National Park in Patagonia, Iguazu Falls is one of the most frequented tourist sites in Argentina, and for good reason. Visitors can enjoy the awe inspiring views of the falls along with tours, treks, and water sports at their base.