scrapped maps

Have you ever been in a situation when you were going through your old vmfs trying to find something and encountered something extremely strange? An obscure box textured with HL2 sprites and one train prop inside? Maybe a part of when you were testing something that never got into an actual map...

How many maps did you people have to go threw until you got a okay map? I have 14 maps scrapped during and after development of the map themselves. How many did you go threw? I had to delete my whitejack. Now I am working on my 15th map which is a koth map.