When we are not in an incarnation - like our current life, we go 'home', to 'another realm', to the place where souls reside. Some refer to it as the 'spirit world', the 'afterlife', the 'unseen world' or 'another dimension'.
There are a lot of interesting theories on what this place 'beyond the veil' looks like, what souls are up to, what they do before and after another incarnation, etc.
In this overview, I am trying to keep track of some of the most popular areas and theories I encountered.