Being inside those old repurposed telecom buildings can be WILD. I was in one that had overhead bundles of ethernet and fiber that had to be multiple feet thick, with the ladder rack bowing down under the weight. Elevator shafts were repurposed for running wires and fiber.
That had a bunch of carrier hotels in it, I'm not sure if Google managed to kick them all out yet, since many had long term leases. But the building has a bunch of truck elevators in it... literally can load a truck up into the building. And a ton of fiber connectivity's which is why the carrier hotels were in there.
And then the building Google owns in Manhattan: https://en.wikipedia.org/wiki/111_Eighth_Avenue
That had a bunch of carrier hotels in it, I'm not sure if Google managed to kick them all out yet, since many had long term leases. But the building has a bunch of truck elevators in it... literally can load a truck up into the building. And a ton of fiber connectivity's which is why the carrier hotels were in there.