Here are a few photos of the presentation by the NOC at Def Con 27 (2019).  But first here is may favorite non-focused photo as it says a lot:

Squirrels? 

Some WIFI User Tracking

Some Traffic Analysis

High-Level Network Diagram #1 For 2019

High-Level Network Diagram #2 For 2019

Previous WIFI Architectures (Rio)

Yuck! #1

Yuck #2

Bathrooms Make Great NOCs!

Other photos!