I saw small parts of a documentary on TV few days ago, about these villages in the Sahara desert, which were designed in such a way that they produced cold air and kept the internal temperatures lower than the external (outside the village). The design did not require any electricity, nor was it reliant on any water tanks, and if I remember correctly, they cooled the alleys and streets by making them very narrow with very high walls on each side.

Does anyone know more about this or what country/region this is from?

Gardhaia, Algeria?

http://www.unep.org/wed/2006/english/Photo_Gallery/Deserts_Desertification/images/P-222-223ALG2006.jpg

It is looking a very nice. I don't think it is on earth. I would be computer graphics.

You mean Hyderabad, Pakistan - the city of wind catchers?

http://i196.photobucket.com/albums/aa36/iaakuza/hyderabad-2.jpg




and, julieCEO, Gardhaia defenitely is on earth ;)

same image, but bigger:
http://static.panoramio.com/photos/original/19057784.jpg