CCHS is a community workshop run by an enthusiastic group of like-minded members, located in Hawthorn, Victoria. Visitors and new members of all skill levels are very welcome. The About CCHS page has more details. CCHS is also known as the Melbourne HackerSpace or HackMelbourne and is one of many Australian HackerSpaces.
Aleksander: Yes, that's part of an original Cray X-MP chassis from the early 1980s.
Also, an 80Mb disk pack from another local Cray X-MP was part of this story ... https://gigaom.com/2014/01/14/the-search-for-the-lost-cray-supercomputer-os