Y-Guaz means "great waters" in Guaraní language. We usually write Iguazú. In 1902, the landscape architect Charles Thay was commissioned to carry out a detailed study of the site occupied by the falls. He later presented a project for a national park, finally created in 1934, which would preserve nature. Originally the jungle occupied 80% of the province's territory. The falls remain the main attraction, but a visit to the park is also an opportunity to discover the region's environment and ecosystems.
Covering an area of 67,000 ha, the park is home to an immense wealth of flora and fauna: more than 2,000 plant varieties, 400 species of birds and multicoloured butterflies. The climate of the region is subtropical. The 2,000 mm of rain that falls each year is continuously distributed; unlike the tropical climate, where the dry and rainy seasons alternate.
The park is divided between the reserve, which is inaccessible to the public and monitored by forest rangers, and the falls site, which is home to all tourist infrastructures.