This is just amazing!! I cannot imagine what this "hill" is made of, what kind of stone or sand. And seeing the tiny little cavehouses is amazing! I went to Google and found such interesting information on these underground cities! How they were formed by volcanic eruptions. Here is the address for where I went(sorry I don't yet know how to highlight this)
http://www.cappadociaturkey.net/photos.htm
This has tons of photos, very nice indeed. Welcome to caedes, and I hope you'll post more photos soon. Verena