You know those cutaway drawings of headquarters, maps of worlds, etc that you used to pore over as a kid? Well, most of them are here on this awesome site. You're welcome.

http://comicbookcartography.posthaven.com/

I can't believe Swanderson wasn't all over this. Or Jay.

I was way into these kinds of layouts an maps as a kid. I love Kamandi's world.

I remember really loving the floor plans and cutaways of the various headquarters and secret bases when I was a kid. I even designed one myself for the Fortress of Solitude

Some thoughts, after going through several pages of these:

I've seen the diagrams of the Avengers Mansion and its basements and sub-basements, but I didn't know that in some reports they also had a large above-ground warehouse annex.

Just how big would Kandor be, in terms of acreage, if enlarged? The place is supposed to have several million inhabitants, according to some accounts, and some accounts say it has a little belt of jungle around it.

Wow, Batman really does have everything in his utility belt miniaturized! He's got grenades the size of a large grain of popcorn, and tear-gas bombs the size of grains of rice!

I love these things. I used to comb over every detail in them.

This is great!

The only real mystery is how Jeff found it before anyone else did. Law of averages, I guess.