At the western end of the state of Parana you will find Foz do Iguaçú, one of the most picturesque cities of the country, thanks to the majestic 275 waterfalls that form the Iguaçú Falls. Located on the border between Brazil and Argentina, in the Iguaçú National Park, the Falls attract hundreds of thousands of visitors from all over the world.
Listed as a Natural World Heritage Site by Unesco, the Park had its Falls selected as one of the New World’s Seven Natural Wonders, and it protects the endangered species of fauna and flora, such as the Brazilian Jaguar and araucária. There you can visit the Garganta do Diabo, the biggest waterfall around, which is 90 meters high.
Another attraction of Foz is the Birds Park, were you can enjoy an area of 17 ha of native forest and observe more than 800 species of birds (hyacinth macaws, ararajubas, black-fronted piping guan and others) that live in the area.
Visit also the world’s largest hydroelectric plant, the Itaipu Hydroelectric. Besides observing closely this gigantic engineering work, you can enjoy the activities offered for people from all ages, such as visiting a museum of pictures, historic components and interactive models, and also trails in 
the woods for observing plants and native animals. It is worth highlighting that Brazil is the leader in researches in biodiesel.
The Three Borders Landmark is also a popular attraction for people visiting the city. Not only Iguaçu and Parana Rivers meet there, but also three important South American countries border: Brazil, Argentina and Paraguay. There is a commercial complex of handcraft shops and cafes, and you can also enjoy the beauty of the sunset at the observation deck.
From Foz you can visit Paraguay. The Friendship Bridge, built in 1965, is the access to the Ciudad del Este municipality of Paraguay.
Source: www.visitbrasil.com