As Barbara Gwara was out running on her usual route around this lake in Poland, she heard some strange noises. Due to the warmer weather, the ice covering the frozen lake started to crack.
"It sounded amazing so I just sat down on a tree and listened to it,' Barbara said. "The quality of the sound in the video doesn't do justice to how beautiful it actually was."
In this video, it almost sounds like the lake is singing.
Have you ever heard anything like this?