back when i was in college I wanted to be a network engineer and was fascinated with data centers. I use to call them up and pretend to be scouting for cages for my employer (this is long before "cloud" was a thing) and schedule tours. I would get to see all the cool gear, power backups, fiber and everything and they would be forced to answer all my stupid questions like "what is your backup plan if a tornado hits this place" haha. It was really fun.

EDIT: one time I went to the Yahoo datacenter in Deep Ellum (East side of downtown Dallas). I walked in without calling first, asked for a tour, a couple guys walked away from a foosball table and told me they were too busy and went back to foosball, jerks. Although, they probably knew i was just a random geek in the neighborhood heh.