The Best Venue Experience of All Time

I've definitely been to Alpine Valley the most just living in Wisconsin. I'm kind of searching for a great venue experience. If you could take a time machine back to see any band or musical act perform live, what would it be? Frank Zappa is the act I'd listened to the most live music from that I never saw live so he's my biggest regret. Marley Led Zeppelin and maybe Zeppelin potentially but not really.