I was traveling in the Middle East for almost three weeks at the end of last year. I got up very early on Christmas morning to hike up Mt. Sinai, hoping to catch sunrise. It was cold and threatening to rain when I set off and halfway up the mountain it started snowing. After nearly three hours, I'd made it almost to the top, then waited in one of the huts until first light.
Shot with a 1DX, 24-105/4 IS at ISO 6400. I took countless scenes like this, at dusk as well as dawn, in tunnels under the pyramids and in dark museums, palaces,churches and temples. I am most definitely impressed with the low light capabilities of this camera.