Alborz Disc Sighting In 2014, a passenger aboard a commercial flight flying in northern Iran, just south of the Caspian Sea, recorded a video with something eerie. A round, wingless object was sighted hovering beneath the aircraft, moving vertically upward. The passenger, whose name remains anonymous, stated “There was no sound and the speed was about the speed of a helicopter.” As the video surfaced online, much speculation grew as to whether the object was a new kind of aircraft being tested by the Iranian military or if it was simply a hoax, but no refuting claims have been offered up.

Want more out-of-this-world tales? Sign up to get extraterrestrial stories delivered straight to your inbox. Subscribe

Booysens Sighting On July 21 and 22, 2010, residents in the western Pretoria suburb of Booysens in South Africa were met with an unsettling sight in the night sky. For two hours a triangular set of vivid bright lights hung above them. On both nights, the shape stayed motionless in the sky before making a descent at 8:30 P.M. Local resident Angela van der Spuy noted, “I couldn’t make out the shape of the object because the three lights were too bright, but it almost had a heart shape because there were two lights on top, a blue light on the left and an emerald green light directly next to it, on the right side, with a big bright white light underneath it which shone straight down.” Both the Johannesburg Planetarium and the South African Air Force had no idea what the lights could be. And with just as much precision as the lights arrived, they mysteriously never appeared again. RELATED: Legend of the Maryland Goatman and the Pope Lick Monster

Alderney Sighting Pilot Ray Bowler flew the routine passenger flight over Alderney near of a group of rock islands known as Les Casquets every day for eight years. But on April 23, 2007 something out of the ordinary occurred. It was a clear day and both Bowler and all the people on board saw a couple of stationary crafts in the sky glowing bright gold. Picking up binoculars, Bowler noted that the objects remained in sight long enough to rule out that the apparitions might be a reflection of greenhouse gases. He later stated: “This [was] a big object in the sky, a very, very big object. I did not want to be too close to it and it was at that time that we had to descend to land. There was no hiding it, they were just there. I wasn’t too happy. I was quite glad to get on the ground … and have a cup of tea.” Bowler and his passengers weren’t the only ones to see the two objects. A pilot near the island of Sark in the English Channel also recorded seeing the objects from a different direction. To this day the sightings have not been explained. RELATED: 4 Alleged Mothman Sightings That Preceded Disasters

O'Hare International Airport Sighting In the late afternoon on November 7, 2006, a group of employees as Chicago’s O’Hare International Airport reported seeing a saucer-like object in the sky near Gate C-17. First spotted by a ramp employee working on Flight 446, the object was later reported by the pilot of the flight. Furthermore, witness accounts soon trickled in from outside the airport area, with many saying that the object was so alarming witnesses gasped as they noticed it. Jon Hilkevitch of the Chicago Tribune wrote, “The disc was visible for approximately five minutes and was seen by close to a dozen United Airlines employees, ranging from pilots to supervisors, who heard chatter on the radio and raced out to view it.” But what is was, no one knew. The Federal Aviation Administration (FAA) later held that the sighting was no more than an obscure weather phenomenon. But without any follow-up investigation, many theorized that the FAA might be withholding the truth. RELATED: The 6 Best Alien Movies Like Arrival

Want more out-of-this-world tales? Sign up to get extraterrestrial stories delivered straight to your inbox. Subscribe