Ran across this website today - please excuse me if it’s been done here already, but I hadn’t seen a thread on it. Artificial Owl is “a site dedicated to provide a selection of the most fascinating abandoned man-made creations.”
There’s plenty of interesting photos and story bits of things like shipwrecks and abandoned buildings:
Namibian shipwreck from 1909.
A mexican church buried by lava.
A danish lighthouse being covered with sand.
Sculpture of a hand in Chile.