Path of Exile free to play in about six hours.

[LochnarITB]

I think the Reset timers on areas is 8-15 minutes depending on the zone. Dungeons (like the Prison) are 15, while Open Air non dungeons are only 8.

Actually, I'm pretty sure the way it works is that areas with sub-areas (eg Mud Flats has Fetid Pool) stay open longer than other areas. I know I've read that somewhere, I just can't find the source.

I'm not sure if we're saying the same thing but my understanding is this. It will exist for 8 minutes, unoccupied, if it is a pass through - one where you go in one end and out only through the other end or the way you came in. If you have more than one way to exit, other than the way you came in, it exists for 15 minutes. An example would be the Sarn Slums. You enter from the camp but can go to the Sewers, Crematorium or Warehouses. The Crematorium lvl 1 would be 8 minutes because you only have exits back out to the Slums and down to the second level.