William Boyce Thompson kept his major philanthropic institutions nearby.
He built the Boyce Thompson Institute for Plant Research across the street from his mansion in Yonkers, N.Y. and surrounded his home in Superior, Az. with the arboretum that also bears his name.
And then he ran out of time to enjoy either one.
Thompson had a debilitating stroke in 1924, just when his two big institutions were getting going. He died of pneumonia in 1930, after the Stock Market crash had reduced his fortunes. The biography on the Boyce-Thompson Arboretum website says he was down to his last $100 million.
You can read that brief biography here.
He left behind an idyllic little canyon near the mining town of Superior, now run as an Arizona State Park, where you can stroll through groves of trees and along a riparian canyon.
It's a good little road trip from Tucson anytime of the year but especially in fall, when the arboretum's trees are at their most colorful or in spring when wildflowers line the state highways on your drive north.