What is engineering? Is it an art, a skill or a just a regular profession?

Either way, history taught us that through engineering, mankind is continuously breaking its inborn limits. Engineering determined leaders and nations to set up ambitious goals and to eventually surpass them. These successful results were achieved through sacrifice & hard work and they are now standing as real symbols of determination and progress.

Here are 12 of the greatest engineering projects man has ever created, that completely changed our perspective over the world: