Hey Juan I’ve always wanted to visit one of the Wonders of the world ! Note how we can simply say “northern Argentina” which makes it sound more natural. Also note the use of the preposition “of” instead of “in.” Do you think the Wonders can be inside the world?? It’s a slight error though it makes a big difference in English! Hope this helps you out and that you can visit “Las Cataratas del Iguazú.” :)