Hobbit House???

This building is a sculpture in the NC Museum of Art sculpture park called Cloud Chamber for the Trees and Sky by Chris Drury.  It looks like a hobbit house, but it is a camera obscura.  There is a small hole in the roof that acts like a pinhole camera.  Images of the trees and sky are projected into the house.  My sister and I went in, but we didn't want to close the door all the way in case we got stuck in there, so we didn't really see any images.  I think it needs to be very dark.  Next time I'll bring a flashlight.