South America the Darién watershed along the Colombia–Panama border, although some may consider the border instead to be the Panama Canal. Geopolitically and geographically all of Panama – including the segment east of the Panama Canal in the isthmus – is typically included in North America alone and among the countries of Central America. Almost all of mainland South America sits on the South American Plate. South America is home to the world's highest uninterrupted waterfall, Angel Falls in Venezuela; the highest single drop waterfall Kaieteur Falls in Guyana; the largest river (by volume), the Amazon River; the longest mountain range, the
Shoshone Falls to the Shoshone Falls area. Over the next thirty years, American and British-Canadian fur trappers hunted throughout south-central Idaho and are believed to have observed Shoshone Falls. However, none of those who kept journals mentioned the feature. John C. Frémont passed through the Shoshone Falls area during his 1843 expedition, which aimed to map the country through which passed the western half of the Oregon Trail. None of his party observed the falls, however, because they left the river canyon (probably near Murtaugh) and cut southwest across a sandy plain to reach Rock Creek. They returned to the canyon rim