Results: It's just water over the dam

Robert-Bourassa Dam in Quebec, Canada reaches 140 meters below the surface, making it the world's largest underground plant. The dam's centerpiece is a unique staircase—each step is the size of two football fields—that sweeps water downward. Have you heard of this dam?

Daniel-Johnson Dam in Quebec, Canada is the largest multiple-arch-and-buttress dam in the world. Bridging the Manicouagan Valley some 200 km from Baie-Comeau, it's unique design is a true monument of Québec engineering. Have you heard of this dam?

The Syncrude Tailings Dam, in Alberta, Canada holds the highest volume of material of any dam in the world: 540,000,000 cubic meters. This dam holds tailings from oil sands extraction; 500,000 tons of tailings are produced each day. Have you heard of this dam?

Grand Coulee Dam in Washington (Columbia River) is the largest in the United States. Nearly a mile long and 503 meters wide, its base area is large enough to hold all the pyramids of Giza. At 115 meters high, the dam is more than twice the height of Niagara Falls. Have you heard of this dam?

Roosevelt Dam in Phoenix, Arizona (Salt River) had Italian stonemasons craft this dam, hand-cutting all the stones for the project. Built in 1911, the U.S Reclamation Service's first major project has brought power, water storage, and growth to the Phoenix area for over 100 years. Have you heard of this dam?

Hoover Dam spans the Colorado River in Black Canyon between Arizona and Nevada, some 30 miles southeast of Las Vegas Nevada. Constructed in the 1930s, the concrete arch-gravity structure was intended to prevent flooding as well as provide much-needed irrigation and hydroelectric power to arid regions of states like California and Arizona.. At 726 feet high and 1,244 feet long, Hoover Dam was one of the largest man-made structures in the world at the time of its construction, and one of the world's largest producers of hydroelectric power. Have you heard of this dam?

Have you toured any dam/facility or its surroundings?

Dams have many pros (generate power) and cons (flooding, interferes with fish laying eggs), what do you think?