7 Wonders of the Modern World
(This list was published in the 1950s)

1. Empire State Building, New York City, USA, then tallest building 102 floors
2. Golden Gate Bridge, San Francisco, USA, longest suspension bridge, 4,200 feet
3. Hoover Dam, Nevada/Arizona, USA, largest dam, 726 ft high, 1,244 feet High
4. Jordell Bank Telescope, England biggest telescope in 1957 250 feet
5. Nautilus, USA, 1954 first nuclear submarine
6. Panama Canal, Panama longest canal, 50 miles
7. Sputnik I (Soviet Union) First artificial satellite