Outside the United States there are waterfalls and earth formed things that are unexplainable of there greatness. And one of the top waterfalls besides Niagra is Iguazu Falls, Argentina & Brazil. Multiple waterfalls in multiple locations!
Peldaños del Cañón (Rungs of the Canyon) in South America. The famous staircase leading to the canyon, located near the big waterfall Pailon del Diablo (Ecuador). This is one of the major local attractions.