Between 1150 and 1550 CE, the Ancestral Pueblo people carved out homes from the volcanic tuff in the area that is now Bandelier National Monument. One of my favorite sites at Bandelier is Long House, a large complex of multi-storied dwellings built against a cliff face with hundreds of small rooms carved into the rock. I love the petroglyphs throughout the complex. You can see the holes for the roof beams, indicating the location of second and third floors. It is amazing to be able to see where people would have stood on top of their roof to make the designs. Please note, it is incredibly important to never climb on the walls of any site and to never touch the rock art images; it is both unethical and illegal to damage archaeological sites.