There are lower dark realms that some might interpret as 'hell'.
We go where our vibration matches. If we have been very bad and have a low spiritual vibration (caused by distancing from our Creator) we will go to those bad low vibe places (you are right, not forever). But if we have a higher vibration we go to higher, lighter realms. There are literally countless planes of existence.
Buddhists go to where Buddhists are.
Christians go to where Christians are.
New Agers go to where New Agers are.
I chose what I want my heaven to be like and can't wait till I get to go there. It will be a vacation of sorts before I go back to the halls of learning again.