What I found was amazing to me, that there are entire homes carved into these cliff walls. And these are not your typical cavemen's homes! Windows, balconies, plumbing, heat, fully operating kitchens, multiple rooms -- how fabulous! These are known as "troglodyte" homes. Here's a link to an interesting video by the Smithsonian on one of these homes: https://www.youtube.com/watch?v=DSbQ3t-j41Y
The ingenuity of our earliest ancestors -- updated and celebrated!