Established to "visually preserve the legacy of significant trees and forests across the U.S.", the Gathering Growth Foundation—founded by photographer and friend of Field Mag Brian Kelley—locates and documents what are called "Champion Trees", the largest living specimens of any given species to protect and preserve them for future generations.
Though photography is the foundation's main medium of preservation, short documentary films have also been added to GGF's lexicon, initially with this heart warming tale of a naturalist's unlikely discovery of the world's largest pine tree, and followed by their newest release, focused on America's largest Japaese Pagoda Tree.
In short, Brian had a hobby of finding the biggest trees in America, and now he documents them. Beautifully, I might add.