Just a normal pre-dawn sky here in Pisgah National Forest. But, there's a donut shape on the bottom of that cloud which isn't something I've seen before. I've read holes can be punched in clouds by airplanes, but I didn't notice any before I noticed the shape in the cloud. I'm stumped.

Nikon D750, Nikkor 24-120 with BD grad filter

adjust highs and lows to balance the bright sky with dark foreground. Clarity, Vibrance and a bit of saturation to bring out some color.