At the heart of the Iguazu Falls is a semicircular waterfall 80 metres high and 2,700 metres in diameter, located on a basaltic line marking the border between Argentina and Brazil. Formed by numerous waterfalls that create vast water streams, the Iguazu Falls are one of the most spectacular waterfalls in the world. Furthermore, this Natural Wonder is surrounded by the Atlantic rainforest, a subtropical jungle with more than 2,000 species of vascular plants. The area is home to the characteristic wildlife of the region: tapirs, giant anteaters, howler monkeys, ocelots, jaguars and yacaré caimans.