UFO Sighting in Anchorage, Alaska on 2017-07-11 00:00:00 - We didn't see or hear anything until we saw the photo's directly after taken. turned around, nothing. a nat?

My husband and i were on day 2 of our alaskan vacation. we weren't aware of time yet, so i'm not sure exactly of the time. maybe around 7pm? i'm sorry. we stopped at lake eklutna for a brief look around, we only stayed about 30 min. my husband wanted to take my picture. it's a new camera so he took two pictures to be sure he got the shot. i immediately wanted to see the photo & walked up to take a look. i looked at the photo, turned to see what photo bombed my picture but nothing was there? i was expecting to see a boat & parachute but saw nothing. we then looked at the next picture and see how far away it is in such a short time. we both determine we don't know what it is so to us, it's officially a ufo. or a really big bug on the lens. i don't know? it's unusual. neither my husband saw anything while snapping the shot nor did we see anything later.