St. Petersburg in winter is especially beautiful in early March when the days become longer and the spire of Peter and Paul fortress is shining gold against the blue sky. 40-cm thick ice still covers the Neva river. The water is clear from the pesky weeds. For winter swimming enthusiasts, it’s the best time and location to sum up their training season by taking part in St. Petersburg Big Neva Open Cup on February 29 - March 1, 2020. Those…