LAZYCHEAT.HTML
Welcome to the easy way out.  I didn't want to spend much effort on this since you all aren't spending much effort on finding the Nightmares.  Okay, that and I'm a tad tired.  So there are 15 Nightmares so far. (I guess I miscounted).  This is how you get to each one:

       
Nightmare 1
       
Nightmare 2
       
Nightmare 3
       
Nightmare 4
       
Nightmare 5
       
Nightmare 6
       
Nightmare 7
       
Nightmare 8
       
Nightmare 9
       
Nightmare 10
       
Nightmare 11
       
Nightmare 12
       
Nightmare 13
       
Nightmare 14
       
Nightmare 15