That's the tallest tower in the park and Square Tower dwelling contains the only kiva (photo 3) that has the original roof. It served as the model for rebuilding kivas in other dwellings. Notice the "crow's nest" in the upper right of the second photo. That isn't even visible in the typical view.
There's a second dwelling around the corner from this one that isn't visible from any trail. If they extend this tour and include that dwelling, you'll find me down there again - if I'm still physically able.