Middle Earth "afterlife"

[Captain Grishnahk]

Like in this world we live in, there is a Heaven and a Hell. And in Middle Earth, i think the thing that represents Heaven is the Halls of Mandos (or somthing like that, i haven't read the Silmarilion yet). I was wondering, is there a Middle Earth Hell-like place? I hope i'm not offending anyone. But when an Easterling dies, where would he go?

Another question, if an orc dies, does it go to some place like an evil man would, or because it has been made does it just die like a dog, and not go anywhere... it's just the end.

For the longest time i thought it was like the void or somthing, or the aybss. But i'm not wholy sure.

Thanks,
-Cap