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In page Iguazu Falls:

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On the Brazilian side, a walkway along the canyon has an extension to the lower base of Devil's Throat. Helicopter rides offering aerial views of the falls have been available from Brazil, but Argentina has prohibited such helicopter tours because of the adverse environmental impact on the flora and fauna of the falls.[citation needed] From Foz do Iguaçu airport, the park may be reached by taking a taxi or bus to the entrance of the park. Their park has an entrance fee on both sides. Once inside, free and frequent buses are provided to various points within the park. The town of Foz do Iguaçu is about 20 km (12 mi) away, and the airport is between the park and the town.