Comment by Betelbuddy

Dont downvote...read their docs....and this is just the start:

"The regions Stockholm, Osaka, and Montreal have three zones housed in one or two physical data centers." - https://docs.cloud.google.com/docs/geography-and-regions

"This means the multiple zones within each of these regions may not be located in physically separate data center campuses." - https://docs.cloud.google.com/backup-disaster-recovery/docs/...

"A region is a set of buildings operated by Google in a geographic location, such as a data center campus." - https://cloud.google.com/vpc/network-pricing