January 17, 2021, Warsaw, Mazovian, Poland: Winter Swimming in Lake Czerniakowskie.in the picture:. 17 Jan 2021 Pictured: January 17, 2021, Warsaw, Mazovian, Poland: Winter Swimming in Lake Czerniakowskie.in the picture:. Photo credit: ZUMAPRESS.com / MEGA TheMegaAgency.com +1 888 505 6342