If you go here you can see the Google Maps aerial photograph of the Dimona umm.. textile facility. It's the darkish gridlike thing right in the middle with a road around it. If you want, zoom out to verify that the location is more or less correct (Google Maps doesn't have actual maps for Israel yet so you'll have to trust me at some level). And notice the very oddly-shaped lake to the lower right.
Next, check out the Israeli equivalent map site. The same oddly shaped lake is there, now much clearer because of the higher image quality. But where on earth has the textile factile gone?