Man’s attempt to conquer Earth has created some almighty structures. Here are seven of the most astounding
The earliest recorded reference to the Seven Wonders of the (now Ancient) World is attributed to Greek engineer and writer Philo of Byzantium around 225 BC. It referenced the most remarkable creations of classical antiquity located near the Mediterranean Rim. The original selection included the Hanging Gardens of Babylon, the Statue of Zeus at Olympia and the Great Pyramid at Giza (the only structure still standing today).
Why seven? The Greeks believed this number represented perfection.
In 1996, the American Society of Civil Engineers provided a list of its own Seven Wonders of the Modern World, in it was included the Empire State Building, the Channel Tunnel, and the five-mile-long Itaipu Dam, which spans the Parana River at the Brazil/Paraguay border.
Here are seven other, century-spanning, logic-defying feats of human engineering.