A lot of the "early" UFO photos that we're familiar with come from the mid 1900's. However, the earliest known photo of a UFO actually dates back to the 1800's. The image below was shot at Mount Washington, New Hampshire in 1870 or 1871 (although some sources have dated it to 1880 or as late as 1896). As you can see, there's a picture of what appears to be cloud formation...with what appears to be a cigar shaped UFO flying in front of it!
UFO SIGHTINGS DAILY: UFO Seen Over Lincoln, Nebraska On Sept 10, 2013, UFO Sightings News.
UFO Photo : Indiana, USA - January 31, 2008
Event 2, 10 minutes later 4-07-2013
Airborne anomalies with the consistency of the mountains they are in front of!
8 Chilling Stories of People Who Allegedly Visited Other Planets