There are more than 30 ancient structures, built by long vanished peoples around 1,000 years ago, at Chaco. They hold hundreds of empty rooms, each of them connected by doors going in and out. Looking through them felt like looking back into time itself. These rooms are all open to the sky – there are no roofs. Yet because of the angle of the light, the play of light and shadow varies from space to space. We are looking through the doors of four connecting rooms here, and the colors change as we move through time and space. The wall of the brightest room, bathed in direct sunlight, is at the very back of image – drawing us towards it with its golden warmth.