There are two countries sharing the Niagara Falls. America and Canada .The Americanside is more on nature . The falls is so beatiful especially the rushing sound of the water that make music on your ear.The best side is in Canadian side, they have all the entertainment while on American Side is more on nature.
While Iguazhu falls is the third largest falls and wonder of the world. There are three countries sharing this falls. Argentina ,Paraguay ,and Brazil. There is entrance fee on this park and the fee is base on your nationality and you can save money if you are dual nationality where you can switch your passport upon their request. The best view is in Brazil side.