Hell

This dark domain is where Scooby was trapped in Operation S.C.R.A.P.P.Y. Even though he is there for a year, only a few locations were depicted in the film. The map on the right of this text depicts a larger view of Hell and notes many more areas and intricacies (such as the River Styx).

Cell 44 is where Scooby was imprisoned for a year. Like the rest of Hell, it can be seen in Operation S.C.R.A.P.P.Y.

Creative Punishment Room C is where Scooby was tortured during his stay in Hell. He only had one session before those in charge of torturing souls gave up...

The Gates of Hell are seen briefly when Scooby is being kicked out of Hell (although he would have passed through them when he was dragged down earlier in the film, even though it's never shown). As Hell is so far down in the Earth, the only way to return to the realm of the living is to be propelled upwards by some force, as Scooby found out the hard way.