30 of the World's Most Impressive Ancient Ruins : Chichén Itzá (Tinum, Mexico). The pre-Columbian Mayan city of Chichén Itzá is visited by over million people annually (making it one of Mexico’s most-visited archaeological sites).
The Iguazu Falls, which runs from Brazil to Argentina, is known to be the most beautiful waterfall in the world. In fact, it is said that the United States' first lady Eleanor Roosevelt said, "Poor Niagara!" when she first saw the Iguazu Falls.