The Stonehenge Screen
To Stonehenge: From Arimathor go up one, right one, and then head north, and keep going north... and then north a little more - a total of 15 screens to be exact but rather than counting them just use the /room command and watch for room #21189. Once you get the need for going north out of your system turn east and you'll run into Stonehenge eventually. Pack a lunch for this trip, you're gonna need it.