World’s largest in a cave . They had to qualify it?

Well, Texas has one that covers acres!

https://www.texasento.net/Social_Spider.htm

Busy little rascals...

Security tests at the prison included having an officer walk the outside perimeter and drag a piece of strap steel against the fence to make it vibrate. Master Control would acknowledge the alarm and you'd go another 20 feet and repeat. During spider mating season the fences were covered in webs and you'd come in covered in spiders to the point they would use a mini-broom to remove the bulk of the spiders before you came inside. Little rascals would be emerging from parts of your uniform for the rest of the shift. Good Times.