Posted by Jerry King from pc126.krakow.ppp.tpnet.pl on January 06, 2000 at 12:28:48:
Apart from the well-known Monkey Island room in Aetherium, there is yet another such location, apparently less known, as I don't see anyone mentioning it... There are probably dozens more of those... the game is full of Easter Eggs and "stamps" left by the Indy team :). Anyway - behind the boulder located in the upper part of the tower-well in the secret level "Return to Peru", there is a hidden room. Return there when the boulder is gone and enter the room behind it. Now press the panels to create the world-famous theme from "Close Encounters of the Third Kind" (4,5,3,1,2) - and enter the newly opened door. Cute, isn't it? Pay attention to the "sun" visible through the window... or take a look at the screenshot below. :) Or don't take any looks if you want to see it in the game first. :)