A piece of Internet history from Wikimedia Commons (via Boing Boing): "This NeXT workstation (a NeXTcube) was used by Tim Berners-Lee as the first Web server on the World Wide Web. Today, it is kept in Microcosm, the public museum at the Meyrin site of CERN, in the Canton of Geneva, Switzerland." Click the photo for a larger image and additional background.
Note the warning label on the tower: "This machine is a server. DO NOT POWER IT DOWN!!" At the time you could take the entire Web offline by pressing a single button. And you thought your data center EPO button was dangerous.