The city I cover has spent the year draining one of its two reservoirs so that it can repair a pipe. Right now, the 20,000-acre-feet reservoir is nearly dry, so the water department invited me up to "see the exposed glory hole."
The reservoir still has some water in places, though most of it is just exposed clay that has been hiding under 120 feet of water for more than a decade. Workers even found an old road still in tact.
Pardon my excesses here.
If you are still curious beyond this large amount of photos, there are more in My Flickr album.