The three main structures of the Cross Group — the Temple of the Sun, the Temple of the Cross and the Temple of the Foliated Cross — surround a plaza with a small platform in the middle. If you stand in this plaza and look to the south, you won't be able to see any of the structures in that direction because of the forest that still covers the southern extension of the Cross Group. But if you walk into the trees, the first building you come to is Temple XXI.