Old maps and hiking books list Embudo Cave trail, which has long since vanished, having been over-run by the Sandia Peak Ski Area. I searched around the area many times before I finally found it.
The site is adjacent to the Cibola ski run, in a small stand of aspins. The cave entrance is covered and locked these days for safety's sake.
To prove that you have visited this virtual cache, e-mail me at firstname.lastname@example.org. Please supply the needed information in parentheses in the description of the cave site:The cave is covered-over with (fill-in the color) metal doors and roof. The door has (fill-in the number) hinges on the (left or right) side. There are (fill-in the number) large locks on the door, which require a (fill-in the number)-sided key.
Please don't include the answers on the geocaching web site (even in encrypted form), which would spoil the fun for others.
I hope you enjoy the outing.