Grand Central Terminal in New York officially opened on Sunday, February 2, 1913, and more than 150,000 people visited the new building on its opening day
At an astounding 630-feet tall, the magnificent Gateway Arch remains the tallest man-made national monument in the United States although it didn't take long to construct.The foundation of the structure was laid in 1961 but work began in 1963, finishing just two years later in 1965
The last of the 30-ton main supports for Seattle's unique, revolving Space Needle restaurant is moved into place for final assembly. The restaurant serves food to guests 500-foot above sea level and was one of the feature attractions of the Seattle World's Fair of 1962
The CN Tower in Toronto today stands an impressive 1,800 feet high. But this 1973 photograph shows the structure looking slightly less imposing