Nah.. just a hypothetical physical region in where:

1. Humans of mass ( or souls ) enter and do not get out
2. Is burning hot, with respect to human senses
3. Has enough walking/living space for inhabitants
4. Obeys the laws of thermodynamics (like hell that will happen)

I don't expect a good comment for a silly answer

Silly as in not in the general concept but the fact that my hypothesis says that its

1) Physical (it could be just a concept of the mind)
2) And obeys the laws of thermodynamics (Need I explain?)

Bro, hold your barrels.