13 The Danube river-pixabay.jpg


Strel swam the Danube River setting new records a couple of times, once for 84 hours non-stop and once for 58 days. But American triathlete Mimi Hughes swam for longer – 2,800 km (1,740 miles) of the Danube River in 89 days, according to WWF Global. She started from the Black Forest in Germany and finished at the Black Sea in Romania, raising environmental awareness. She braved rain, cold, high water, dangerous eddies and debris, as well as a broken toe.