You have to know to look for it. Enter the Scottsdale Museum of Contemporary Art — and you can walk straight ahead to the current exhibits, or turn right into the gift shop. Both wise options. Or, if it's close to sunset (hint: the museum is open late on Thursdays — and admission is free), take an immediate sharp left. Down a hallway you'll find a small, oval-shaped room, all concrete. It feels monastic, but settle yourself onto the hard gray bench and look up. From dusk to dark, the change through that ivory-framed hole is remarkable, as the pale sky takes a tour through the blue-hued section of your 64-pack of Crayolas. End your time in the small space with a dark velvet blue sky and a feeling that this is a day — and night — to remember.