“Freediver” Swims Under the Icy Surface of a Lake
A "freediver" named Petr Kapoun swam directly under the clear surface of a frozen lake in the Czech Republic. There are two holes cut into the lake, and he swims from one to the other as he follows a yellow rope placed under the ice as a guide.
He did it while wearing a Speedo and goggles, and he had a safety crew with him.