Go to Italy/Greece/Spain.
Buy a small piece of land (half an acre is more than enough)
Plant an olive tree (plant two or three as a backup)
Wait 1000 years
One thousand year old tree.The article is about human deforestation meaning there is an age gap of trees so there is no generation turning a thousand for the first time — no trees that will become ancient before the current ancients die. They are trying techniques to make younger trees have characteristics of older trees in order to keep the ecological presence.
Even for other kinds of long-lived trees, places without big ice storms, hurricanes, etc. that would prematurely end the tree are probably safer bets.
You could always settle in the Mojave, plant a grove of bristlecone pines instead.
I don't know if more boreal climates support longevity, I think it has to be some combination of temperate + dry + safe from natural disasters like wildfires and hurricanes
a wet dessert sounds similar to tira-misspell?