I don't know anything about this particular site, but I presume it's one of the new mega gpu sites.
I'm seeing many people in the comments with an early 2000's era concept of datacenters. The scale of these new sites is mind boggling. Take your idea of a typical datacenter building. Make it 4x bigger. Then put 4 of them together into a cluster. Then imagine 10 of those clusters at the site.
None of that is new whatsoever. AWS has been doing that for 15 years at this point. The cloud didn't start existing just because of AI.