The O2

You're standing in Peninsula Square watching the crowds pour in, the massive white tent-like structure rising up against the Greenwich skyline like something from a sci-fi film. The O2 is basically London's main event venue—the place where you catch everyone from Adele to Arctic Monkeys, WWE wrestlers to comedy tours. It's slick, it's modern, and honestly, the sightlines are genuinely impressive for a venue this size. Yes, it's corporate and a bit soulless compared to smaller rooms, but when your favourite band's playing a twenty-thousand seater, this is where they're doing it.