I am intrigued that there is an underground Lego vault in Denmark that contains every Lego model ever released by the company. I would love to go see this collection of Lego models in person and also take my son with me to marvel at the amazing legacy of this company.
If Lego made a secret vault, I would love to bring my children to visit it. Not only would they love it based on the title alone, but it would be a great experience for any Lego lover. I imagine it would be full of all kinds of unique Lego creations.
I think that if given the opportunity I might find it fun, but despite my interest in Lego's I would not go out of my way to visit. For me the joy comes from playing with Legos and building new and exciting things. Seeing a bunch of Lego's in a vault would not add to that.
No, I would not enjoy visiting the secret Lego vault. While I understand that there are many Lego hobbyists and enthusiasts, both young and old, I am not one of them. I'd much rather visit something that appeals to me, such as the vineyards of Napa valley. I don't need to visit a place just because I might have played with Legos as a kid.