OPTICAL ILLUSIONS!! ENJOY IT :)

1)Are the walls of this building facing inwards or outwards?

2)What appears to be a gaping chasm in the middle of the street..?
 

...Is actually a street painting, seen here in mid-creation.

 

3)Which of these two dots is in the true center of the circle?

With the distracting lines out of the way, it's apparent that the green dot is at the center.