I'm going to Arizona for the first time in October, and was just browsing google maps when I found this:
It appears to be a massive test track/proving ground, but it is easily twice the size of the nearby Volvo one:
That Volvo facility looks amazing, all the testing tracks and the 2.15 mile straight away looks fun.
But, it's dwarfed by the almost 4 mile wide track about 15 miles to the west...what it is?
Edit: The track is exactly 10 miles all the way around.
Modified by windycityvdub at 12:17 PM 8-5-2009