An unusual object that many think may have been a UFO was accidentally photographed above the Muiderslot Castle, a landmark, in the Netherlands, according to the Huffington Post.

Corinne Federer was visiting the castle, which was built in 1285, with her mother on May 25. An avid photographer, she was taking High Dynamic Range, or HDR, photographs of the castle.

"In order to create HDR images, you take three or more exposures - this one happened to be five - and you shoot them all at the same time, because you then overlap the images and it gives you the full spectrum of light, which your camera can't capture but your eyes can," Federer, 43, told the Huffington Post.

When she was reviewing the images she had shot, Federer saw something unusual in one of the five-image progressions she had taken.

"It was a tubular-shaped object that had an S-shaped fin on it," Federer said. "If it had been any type of missile, it would've had multiple fins, but facing the same direction.

"We heard nothing, it was completely quiet out," Federer added. "The more I flipped through the frames, it was kind of creepy.

"I've been shooting for quite some time and I've seen other stuff in the news, but I've never seen anything [like this] with my own eye," Federer said. "The object is not in the frame before or after, so it had to be going really, really fast."

Federer made adjustments to the gray scale settings of the images, which made the unidentified object clearer to see. This brought a portion of another object on the left side of the photo.

Ben Hansen, a former FBI special agent who has used his skills to analyze thousands of videos and photographs of alleged paranormal events, and is currently the host of "Fact or Faked: Paranormal Files" on the Syfy Channel, looked at the photographs.

"Having reviewed the raw files, there's no overt indications that the photos have been manipulated with post editing software," Hansen told the Huffington Post in an email. "Having the sun in the frame is helpful because it indicates where shadows should appear.

"This further supports that the object was photographed 'in-camera' and not added later," he said.

Hansen's opinion on the photograph is less extraterrestrial, however.

"If I had to place my money on it, I would say that we're looking at insects," he said. "We typically see many wing protrusions...It all depends on the shutter speeds and motion of the insects."

However, before finishing his analysis, Hansen made an additional observation that there is another object that appears to have no protrusions.

"When I look at the amazing photography which captures the night sky in long exposures, and you can see how many stars are out there, I think there's absolutely no way that we're alone," he said. "So I don't find it unreasonable to believe that there's another habitable planet somewhere that has started exploring space."

There was recently a video taken in California by a woman that was thought to possibly be a UFO as well.