Hoover Dam, once known as Boulder Dam, is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the US states of Arizona and Nevada. It was constructed between 1931 and 1936, and was dedicated on September 30, 1935, by President Franklin Roosevelt. Its construction was the result of … Read more

Hangzhou Bay Bridge is the largest bridge ever built in China, the bridge links Shanghai to Ningbo in Zhejiang Province, cutting the traveling distance between the two port cities by 120 km and driving time from 4 to 2 hours. The 10 billion yuan, S-shaped bridge will shorten the ground distance between Ningbo and Shanghai. … Read more