Of Course! There are 9 of these rooms on each SMP. They are all at the waste. They are all protected, so you may not take anything!
Oh! Oh! Oh! Someone else found it! I found that room with cordial_pie like a year ago and we got stuck in there forever xD
Sweet! Finding it again is still tough, but its good to know what to look for to get in! I got there with hisack55, flamin_pickle, and a couple others one day... There are some fun hidden easter eggs around EMC, that is for sure.
I was the first to find the exploit to get on top of the new tutorial xD then I told Aikar and he fixed it ;i