3D perspective drawing . . .

This was an extremely interesting exercise to complete. I do engineering with architecture and haven't had much experience drawing objects, in various perspectives so it was a new experience for me. It was initially slightly confusing to comprehend the concept of 'vanishing points' however by the end of the drawing I understood the concept well. 

Once we had completed this exercise the more challenging task was set, in which we had to sketch a building or place in the univesity using our knowledge of perspective and vanishing point. I found it hard to start the drawing as a whole, not knowing where to begin yet. Below is my attempt...