The gate to the Dream World, as seen in Wes Craven's New Nightmare.
The Dream World is where Freddy Krueger kills his victims whenever he enters their dreams. After his exposure as a child killer, and was being burned to death by the parents of the victim, he was approached by three dream demons. Here, in the Dream World, he is invincible to any attack, such as when Jason Voorhees cut off both of his arms, he grew them back a second later. However, he can be pulled into the real world, where he is vulnerable, should his victims be hurt on the outside world and touching him at the same time.