There are a couple of places online where you can send your cremated ashes, and they’ll mix it with potting soil and a tree seed/starter. Then your family goes and plants the tree, which is ostensibly nourished by your ashes. Could be in the back yard, could be in the forest.
For me, I like the fact that I’m not going to take up space, or be a burden on any of my survivors. Plus, why not plant a new tree? I’d want some kind of fir tree along the PNW coast.