Robert Moses-Robert Saunders Dam, New York

This large dam spanning the St. Lawrence River is part of the St. Lawrence-Franklin D. Roosevelt Power Project, and is part of the St. Lawrence Seaway, a multibillion dollar engineering project along the river, developed in the 1950s. Power plants on either end of the dam generate around 1,000 megawatts each, equivalent to a coal or nuclear power plant. The dam is just part of a massive engineering project that turned this part of the St. Lawrence into a hydraulic landscape machine. Three dams hold back the water on this stretch of river, turning it into a lake, and regulating flow out of the Great Lakes. A series of locks on the south side allow traffic through along the St. Lawrence Seaway. The international boundary goes through the middle of the dam.