LHOD Questions

I'm just writing this to get my present thoughts down and to see if any of you guys have answers to them. I've been reading LHOD and some questions arose. I was wondering if anyone knows what Dothe is and what the mechanics of it is. From why I gather its a form of super strength (?) but I don't really understand when it can be used or what it actually does to the body. Also I was confused on Genly's movements. When he visits the foretellers, is he in Kharhide? Thanks in advance if you can clear these things up for me.