A sculpture in progress by Rodin. He said that the material he worked with would reveal what was already there.
Inspiration is like that. You find it. or it reveals itself to you.
Then of course the Banana was a study in nothing just interesting.
The old train car reminded me of when I was a teenager, moving irrigation pipes on the nearby farms. We found people living in these old cars and on a few occasions some of us saved some gas and spent the night there.