You can find examples of mental safe places on my blog. You may not know you have one but ALL dissociatives have them sometimes they dont realize what they are experiencing is a mental safe place for example

All dissociatives get to feeling far away and floaty in a tunnel like area. Thats a mental safe place.

Some people have "rooms" or "worlds" where they go beyond the tunnel area.

Any thing (anywhere) the person uses (goes) to mentally escape the present situation is considered a mental safe place.

You can find more information about this and other DID information on my blog.