You can find it pretty much anywhere actually. It's a by-product of many mining processes and India has literal beaches of it.
I believe magamiako is referring to areas in World of Warcraft where thorium can be found.
Incidentally, comments like that are why it's so irritating to try to have discussions of thorium on Reddit. Of the people who post in those threads, a significant fraction are just there to make WoW references.
I have the same problem with discussions of Uranus.