Pfhor Your Eyes Only... is the seventeenth level in Marathon. It is the first level of The Pfhor, the fifth chapter of the game.
You have just been teleported here from Neither High nor Low. The point of this level is to explore everywhere then to return to the beginning and look out the windows facing the UESC Marathon.
Once you've explored the level and are standing in front of the window, Durandal will teleport you to No Artificial Colors.
Marathon - Level 16: Pfhor Your Eyes Only...