A viewer of Nashville's News 2 sent a picture of ice floating down the Cumberland River near McGavock Pike.
Joe Dixon said that each morning, really early, he takes his dog outside and sees debris floating down the river.
"I thought it was Styrofoam chunks," he said. "And then I got out the binoculars yesterday morning and noticed that it was actually chunks of ice. Some of it really big chunks of ice, some of it the size of basketballs and softballs."
Dixon said that some were even the size of a 50 gallon barrel.
Nashville's News 2 knew that the ice couldn't have been coming from a natural source in May, so they looked around upstream to find the source.
After following the river for almost 17 miles to the dam, the Corps of Engineers said that there is not a factory or industrial complex near the river that would be putting out large amounts of ice.
The source is a mystery, and anyone knows where the ice might come or have pictures, send them to Nashville's News 2 to become part of the iReport 2 Network.