Obama's Arena

When Barack Obama formally accepts his nomination as the Democratic candidate for president, he'll address an enormous audience. Instead of speaking at the Pepsi convention center in Denver, he'll head over to INVESCO Field at Mile High, home stadium of the Denver Broncos. Just how big is the Broncos' stadium? With 1.7 million square feet of space, it has enough seats for 76,125 spectators.

^{Photo: The Denver Broncos' Stadium, INVESCO Field at Mile High, in Denver, Colorado. © Ronald Martinez / Getty Images}