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
East Sioux Falls, South Dakota to the incorporation of East Sioux Falls as a municipality. Numerous structures were built in East Sioux Falls including worker's cottages, post office, town hall, depot, school house, general store, hotel, grain elevator, stable, saloons and jail. The remains of several buildings are still visible within the nature area. The quarried stone was cut into building stones and paving blocks and shipped to construction projects throughout the country. The pink quartzite was superior in quality to other stones and possessed a coloring which was extremely delicate and pleasing to the eye. The stone was used in the construction of several