The first acrylic I ever painted was of a grain elevator. And it sold. Then the man who bought it commissioned six more paintings of elevators! Since then I've always had a bit of a soft spot for grain elevators.
Recently I have gone back to painting elevators. The last several years, with all my ongoing foot problems, I haven't been able to hike. So, instead of going on hikes to find cool new stuff to paint, I've taken to driving around Colorado's small towns looking for grain elevators. This fulfills some of the same aims: exploration, finding out-of-the-way places to paint. It is quite difficult, though, to find an aesthetic view of grain elevators, not a particularly paintable subject. But it makes a good challenge for a painter, to find the appealing angle to a normally uninteresting subject.