Iguazú speaks differently on each side of the border. Argentina pulls you into the falls on thick wooden walkways; Brazil pulls the view back like a wide stage. Seeing both is hearing one symphony on near and far microphones.
A rain poncho and non-slip shoes are essential; spray near the Devil’s Throat soaks everything. Early entry helps with light and crowds. Do not rush park trains and trails.
Surrounding parks are fragile; follow food rules. A quiet riverside dinner in Foz or Puerto Iguazú softens the day’s roar.