Climbing in Grain Silos

I’d heard about some climbing gyms set up in old grain silos. While a lot of times on the road, I’d see rocks and wonder if you can climb it. This guy sees grain silos and wonders if you can set up a gym in it.
Village considers wall-climbing gym. So is climbing in a grain silo a good experience? There must be a lot of grain silos out there…

For some more gyms in grain silos, see OKC Rocks and Upper Limits.