Watch: Freediving Under Clear Ice

A "freediver" swims under the icy surface of a lake.

February 6, 2019

(Photo by Stephan Pietzko/

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.