Upon seeing the cataratas del iguazú, eleanor roosevelt exclaimed . the cataratas del iguazú were declared a world heritage site by . the tren ecológico de la selva is a service provided by

1.  Niagara Waterfalls are one of the most beautiful places and sights in the world. It's majesty attracts visitors from all over the world. But still at seeing the Cataratas del Iguazu, the First Lady Eleanor Roosevelt exclaimed: "Poor Niagara" as it paled in comparison.

2.  The correct answer here is UNESCO World Heritage. United Nations Educational, Scientific and Cultural Organization declared this a world heritage site in 1984 and thus was declared a site of great importance for the heritage of the human race. It is now protected by the international law.

3. Tren Ecológico de la Selva or in translation Rainforest Ecological Train is an Eco-friendly way to get to the walkways of Argentina, as it is located in Iguazú National Park. The train has a propane locomotive and it is painted all green. The train service is operated by Iguazú Argentina and the track is owned by Iguazú National Park.