Either way, that’s preferable to smelling like a toilet. On that note, I don’t recall ever having smelled a dungeon, so I’m not really one to judge.
It smells like humidity, salt and spiders.
What do spiders smell like? And humidity only smells like the thing that is humid. So… humid spiders. This is not a nice mental scent.
Spiders smell like primal fear. Especially when they are unexpected and plentyful.