Classic of the classic but safety pin, absolutely...
In both sides of the Brazilian and Argentine frontier, the falls are part of one natural reserve: the Iguazu National Park (Argentina) and The Iguaçu National Park (Brazil). Both parks were included into the World Heritage list for the UNESCO in 1984 and 1986 respectively. The falls are mostly in the Argentine side but the most beautiful views are from the Brazilian side.
In the Argentine side are many roads to visit in the middle of the forest and a lot of bridges to cross the different rivers. And it is possible to get so close, just a few meters, to the falls. There is also a train that takes you to one of the different points, the most impressionable waterfall: La Garganta del Diablo (700 m long and 150 m wide).
These falls are part of the 3 most spectaculars of the world with the Victoria and Niagara falls.
These falls are in the middle of a tropical habitat and the view, although it is very touristy, is spectacular.
Patagonia in all seasons menu. For example, according to the climate, from Bariloche, in Patagonia Argentina, it is possible to go to Puerto Montt, in Chile, crossing successively three lakes by boat, as did the Jesuits and the first German settlers. I offer a tour that leads to the Pacific Ocean. It is quite long, but the beauty of the sites - forests, volcanoes and crystalline lakes - is such that it is worth to be carried. The Argentine side, cross the west arm of Nahuel Huapi and Lake Puerto Alegre and, the chilen side, Lake Todos los Santos. Moving from one lake to another by bus. This tour is feasible in all seasons, but in winter, it takes two days to reach Puerto Montt, stopping for one night at Peulla. We returned to Bariloche by air or by the same way, after a night in Puerto Montt. Borispatagonia is also responsible for visas to go to Chile and to book hotels. In Patagonia, winter and summer are tourist seasons. In summer, besides explore the surrounding, many activities are available: climbing, torrent fishing, sailing, horseback riding, hiking, rides, visits to Aciendas... In winter, the main activity is, of course, skiing, especially in July and August on the side of the Andes, but not only: snowshoe hikes, thematic tours, many walks to admire the beauty of Patagonia Argentina and Chile in this season, due a unique light, the warmth of the people of Patagonia... Just to talk about, I get goose bumps!