Martin Strel has stunned people around the world with his feats of endurance in long-distance swimming.

The 57-year-old Slovenian has claimed a succession of Guinness World Records for swimming the lengths of the Danube River, the Mississippi River, the Yangtze River, and the Amazon.

His epic 66-day, 3,300-mile swim of the Amazon was documented in the award-winning film “Big River Man“, securing Strel’s notoriety as an unconventional athlete…

In Search Of Incredible spoke to the fearless swimmer as he prepares for his next big swim.

How did you get into long-distance swimming?

When I was young I swam up and down many times and people didn’t understand me. I swam nonstop, sometimes for 10 kilometers (6.2 miles), even though I was very young. It was very hard for people to swim with me; I was pretty fast already. Maybe I was born like this, who knows.

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