What's the Cutoff Between Good and Great?

The total length of the sections of the Great Wall of China, it adds up to 30,171 miles. "I was looking at one of the greatest, like one of the great things man kind of has ever built and all I can think is that it's pretty fucking long," he says. The M25 goes on for miles and miles, right? That's just like... All right, sort of thing that was like news article. These two boys are running across the GreatWall of China. It's like, come with that?"