How to Nest Folders?

First time using Squarespace as an experienced web dev.

Is there just no way to nest multiple folders within each other? Can one folder only hold pages and that's it?

If so, that's really disappointing and limiting. Not to mention more difficult to maintain and visualize.

I haven't had any luck searching the internet. Basically I'm looking for something like this.

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Can one folder only hold pages and that's it?

That is the case. There is no nesting of folders.

Dang, code injection it is I suppose. Seems like a bit of an oversight to not include that functionality out of the box. 

Thanks for confirming though. 

If you need something like a mega menu then code injection is the ticket.

I believe there are some SS specific mega codes being sold out there. I don't have any pointers.