Nice pics, CC. Like my first grade teacher once told me, thanks for sharing!
On the subject of the "football game in a race track:"
1) why the heck would we want to play there?, and
2) has anyone looked at the dimensions of the place compared to a football field?
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Bristol Motor Speedway, Bristol, Tenn.
"Worlds Fastest Half Mile," 0.533-mile concrete oval
Degree of banking in corners: 36 degrees
Degree of banking in straights: 16 degrees
Straightaways: 650 feet long.
Concrete racing surface is 40 feet wide.
Seating capacity: 160,000
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Here's a diagram of how little the field would be (and how far away YOU would be from the action): (this is rough, but in scale)