20. Iguazu Falls, Argentina/Brazil
Iguazu Falls, straddling the border of Argentina and Brazil, is one of the largest and most spectacular waterfalls in the world. With over 275 separate falls stretching nearly two miles and the tallest drop at 269 feet, it’s truly impressive. The falls are in Iguazu National Park, a UNESCO World Heritage Site full of lush rainforests and diverse wildlife like jaguars, tapirs, and toucans. Visitors can see the falls from both the Argentine and Brazilian sides, walking along paths that offer stunning views. For an exciting experience, you can take a boat ride right into the spray of the falls.