Help me find a particular kind of installation art?

I'm looking for images of a particular kind of installation art. Even some terminology that may help me in a google search.

I'm looking for a type of installation art that you might see on a hillside or in a large room, wherein from most angles it seems like there's just a bunch of random structures, but from one vantage point, there's a clear image. As you move around the space, the change of perspective makes it seem like a shape is forming. Does this make sense?

I remember seeing something like this done in a village in Austria or Switzerland. As you traveled down the highway, it looked like there were random structures on some of the houses, but as you drove past the village on a hillside, the structures seemed to come together and form connected shapes. It's all done with perspective....