U2 In Or Out? Your Favourite U2 Gig?

[Gruffalo]

Personally I prefer going to see U2 indoors but ironically the best gig that I've seen them play was outside on the Zoo TV tour at Yankee Stadium in 1992. What is, or would be, your ideal preference?
If you've seen them more than once, when and where was the best gig, for you!
Just Curious!