The Pueblo were cliff dwellers. They built homes of adobe brick on cliffs and on mesas in the southwest.
Homes were stacked one on top of the other, like an apartment complex. Sometimes they were stacked four high. Those who had homes on the ground floor could simply walk up to their door. Others had to climb ladders to reach their front door.
Each floor of homes had a walkway that ran in front of many doorways. Once you reached the next level up, if that was your floor, you used the walkway to reach your front door. If you needed to go higher, you found a ladder and climbed to the next level.