Walk east one map space from the Ancient Green Wyrn Hut, then south (down) into the 450 level Really Freaking Old White Dragons.

Walk all the way down, keeping the trees to your right, to the trees at the bottom.

Walk west (left) along the trees at the bottom untill you see the"DIRECTION" Arrows pointing into the trees.

Walk on top of the trees, and follow the arrows untill you see the portal sign warning you to turn back now.

Once you step into heaven, you will have to warp, or die to get out.