The Technolicious Arboretum, or: 7 “terrestrial activities of aliens,” Part I
Either the trees have started to fossilize in a week, a technolicious process that usually takes 100 billion years, or the Earth has sprouted stainless steel roots, like an epiphyte in search of minerals, then pumping them all in, core-bound, to replenish an iron-depleted mantle.
The Technolicious Arboretum in Central Park.
It's also growing in Aspen, Colorado.
They're all over the place. This one has sprouted in Sweden.