There's some wierd stuff going on in this area. I checked in Fly!2 and as you say, YAYE is buried in a hillside. Bit strange considering the whole area is a flat plain.So I downloaded the GTOPO30 file for the area and had a look. Importing the scenery into Fly! results in the airport being in a slight depression (the result of airport flattening). However, I still haven't found the rock. Checking the DEM file in the viewer doesn't really show anything at the LAT / LONG of the rock. I would expect at least a white spot.
I guess it's possible that the rock is just too small to show up on the DEM file. I shall have to investigate a bit further.
Andrew Luck
18 SW EGSH