David Elder, an amateur photographer was trying to take a photo of a swan on Loch Ness in Scotland when he got more than he bargained for. Suddenly, something mysterious and large seemed to be bubbling under the water.

He described it to the UK Mirror as a “solid black object” just under the water that created a wave atop the lake surface. The sighting immediately fueled speculation that this might have been a Loch Ness Monster sighting.

“Water was definitely going over something solid and making the wave. It looks like the sort of wave perhaps created by a windsurfing board, but there was nobody on the Loch at the time, no boats, nothing. It is something I just can’t explain.”

Nobody else has been able to explain this phenomenon for hundreds of years. The lake in the Highlands of Scotland is 23 miles long and 755 feet deep.  The legend of Loch Ness Monster sightings dates back to medieval times