That’s North Window on the left and Turret Arch on the right. South Window is in the middle, but hidden by the camera angle – and some large rock. If you click the image for the larger size, you can see small dots along the base of North Window. Those are people. (Gigantic size here [3264 x 2448, 3.7M]).
July 31, 2010. Arches National Park, Utah.