Discussion: I'm eager to see it too

45 years ago I was engaged in some interesting but mapless (and strictly unsanctioned) orienteering in the steam tunnels at Yale. Not long after (and perhaps while I was still a student) the authorities welded the manhole covers shut, and locked the other "secret" means of access.

I assume this will be primarily an above ground activity this time?

I have heard about all these secret doors and underground tunnels both around Yale but also all over New Haven. Exciting!