One of the best perks of working at Tumblr was once a month they had a data center tour for employees, you got to go to NJ for a day to see the facility, all of the power equipment, cooling, network equipment, and the servers themselves. Really awesome and eye opening. Pictures don’t really convey the size of these places.
For example, here's an AWS facility in us-east-1. Pairs of narrow white buildings, ACs on top, generators in parking lot, switching station next door, nondescript name: looks like an AWS data center to me. (Thanks to the WikiLeaks doc I happen to know for sure this really is AWS, but you can tell just from the satellite.)
https://www.google.com/maps/@39.0271558,-77.4541392,698m/dat...
If you have the WikiLeaks document you can just google the "IAD50" type codes and generally find them, but that's no fun.
Seems the URL is down however https://wikileaks.org/amazon-atlas/