ExCeL is a colossal beast, sprawling across a massive 100,000 square metres. That’s about the size of 14 football pitches, all under one roof. Can you even imagine walking from one end to the other?
You might know it as the home of Comic Con or the London Boat Show. It’s basically a warehouse for awesome events, with enough room to host a small city inside. It’s not pretty like a cathedral, but it’s undeniably impressive in its sheer scale.
A Surprising Number Two
Now, this is where it gets a bit tricky. You see, some definitions of “building” might ignore open spaces. If we talk about enclosed volume—the actual air you can fill—the runner-up is a rock star.
That would be The O2 Arena, the giant dome that looks like a white golf ball. It holds about 20,000 people for concerts, and its cap is massive. But ExCeL’s flat, sprawling footprint still wins the floor space game.
