So a bit of research work has found that the Melbourne Cricket Ground is on the verge of having its' 100 millionth patron go through the turnstiles to watch a football match.
Football was first played at this site in 1869 and early records are certainly spotty at best the bulk of those patrons are well accounted for.
What other stadiums around the world have similar records? It would need a combination of age, size and frequency of events to get to a number that large, and would never have moved which possibly rules out some candidates.
Anfield? Old Trafford? Wembley? Nebraska maybe, but even 300-odd sellouts in a row only comes to about 30 million. Michigan?