Tours of a data center most of the time end of up on a tour of a NOC.
A network operations center (or NOC, pronounced "nok," like the word "knock") is one or more locations from which control is exercised over a computer, television broadcast, or telecommunications network.
Large organizations may operate more than one NOC, either to manage different networks or to provide geographic redundancy in the event of one site being unavailable or offline.
Check out this video of the Saudi Aramco Command Center, the ultimate NOC. This is part of 60 minutes special.
What is the hardware behind the Saudi Arabia Command Center? I would bet Dell and HP based on the use of Dell and HP Hardware used by Saudi Aramco for the Top 500 Super Computers.