River...Martin Strel is a swimming marvel. The Slovenian holds multiple world records, and his specialty is swimming the entire length of rivers... Amazon, Thames, Mississippi, Yangtze, Danube, you name it, he's swam it. Except the Nile! So why not?! Martin tells us about his amazing feats of swimming and why the Nile is not on his list of river results.

Deep...In 2000, Jill Heinerth was already a renowned diver, known for her exploits mapping vast underground cave networks in Florida. Filming for a National Geographic documentary brought a new and unprecedented challenge; a vast iceberg known as B-15 had broken away from an ice shelf in Antarctica, providing a unique chance to explore its networks of underground caves. Braving sub zero temperatures and the treachery of constantly shifting ice, Jill became the first person to ever enter one of these caves - a historic milestone in diving.

Mountain... Joshua Patterson is an ultra-marathon runner who later this month will attempt to become the first man to complete a marathon at over 6,000 metres altitude. Having successfully become the first person to run 76 marathons in the 76 cities in the UK...in 76 days he's pushing himself to the very edge of physical exertion. He tells us about what he fears the most about this latest challenge, and his motivation the passing of his godson Archie and raising money for www.babylossclub.com, charity Archie's parents have set-up.

High... The world’s best athletes are back in Tokyo this week for the World Athletics Championships. It’s a return to the city that hosted the delayed Olympics in 2021. But, the high jump competition will have to go a long way to compete with the drama of four years ago, when Italian Gianmarco Tamberi and Qatar’s Mutaz Bar-sham SHARED the gold medal; the first time that’s happened in athletics in over a hundred years. lions around the world… As you Gianmarco is a real character. Before Tokyo he was famous for turning up to competitions having shaved half his beard! That’s right one side of his face hairy, the other clean shaven. What made Gianmarco’s journey to gold even more remarkable was he’d missed the Rio Games due to injury. The cast he had worn on his his ankle, served as inspiration, accompanying him all around the world, including that night at the Olympic stadium

Photo: Record Breaking Swimmer Martin Strel Emerges From The River Thames In London To Launch A Film About His 3,375 Mile Swim Down The Amazon Entitled 'Big River Man. (CREDIT: John Phillips/UK Press via Getty Images)