Have an 18 inch difference of land between myself and back yard neighbor. he
is 18 inches lower than I am.

I was wanted to put 3 6x6 on top of each other to make a retaining wall so
it is facing him and for me I can go right up to the wall with my soil and
grass. Then on top of the retaining wall I will build a wooded fence.

Anyone have a any pointers or pictures of how this can be done well so its
solid and able to hold a 6 foot fence on top of it?

thanks