I used to HATE this question in therapy!
Think it took about 4 years of searching to FIND a safe place I could identify in myself.
Normal places, bed (oh hell no) arms of a loved one (wtf even IS that) a 'special place' all for me that I've kept secret (are you kidding me? There isn't even a part of my ANATOMY that is secret)
The list went on and on, and I scratched every suggestion before it was even finished being said.
Then one day it suddenly dawned on me. MY OWN HEAD. In here I could be me, if I was prudent, no body could enter it, sour it or reach me.
Not exactly the best option for a 'cure' with hindsight, but it got me to the point that i was able to control SO many of my really obvious symptoms, by just realising that my mind, was the only thing I had total control over.
I got to choose what I thought, and I could choose to think things differently.