Let's look at the impressive skyscrapers.

How can you not be afraid of standing on top of a skyscraper and photograph the landscape?
Turns out you can. Then uncover the secret of such dangerous shots.

How could build a skyscraper? 
Such a miracle as a skyscraper, would not have been possible without the invention of steel frame. Assembling the steel frame - the most dangerous and difficult part of construction. It is the quality and speed of assembly frame determines whether the project is implemented on time and within budget. 
I recommend for viewing.

The construction of the main building of Moscow State University on Lenin (Sparrow) Hills in 1949-1953. was one of the largest construction projects of the postwar Soviet Union.
MSU was the highest administrative and residential building in Moscow until the "Triumph Palace", and the highest in Europe, before the building in 1990, Basler Messerturm in Frankfurt.
Height - 182 m, with a spire - 240 m, the number of floors of the central building - 36. Pupils of the school for working youth under construction on the background of the main building of Moscow State University (1951)