Seven wonders of engineering and architecture
The Seven Wonders of the Modern World
People have put together many lists of the seven ancient wonders of the world. But this “seven wonders” list celebrates monumental engineering and construction feats of the 20th century.
Empire State Building
Finished in 1931, it towers 1,250 ft over New York City. It was the world’s tallest building until 1972.
Built by Brazil and Paraguay on the Parana River, Itaipu dam is the world’s largest hydroelectric power plant. Completed in 1991, its length totals 7,744 m.
In 1976, the tower became the world’s tallest freestanding structure. It looms about one-third of a mile high (1,815 ft) above Toronto, Canada.
It took 34 years to create this 50-mile-long canal across the Isthmus of Panama. It was the most expensive project in American history at that time.
Known as the Chunnel, it links France and England. It is 31 miles long, and 23 of those miles are 150 ft beneath the seabed of the English Channel.
Netherlands North Sea Protection Works
Because the Netherlands is below sea level, a series of dams, floodgates, and surge barriers have been built to keep the sea from flooding the country during storms.
Golden Gate Bridge
Connecting San Francisco and Marin County in 1937, for many years this was the longest suspension bridge in world. It took about four years to complete the beautiful 1.2-mile-long bridge.