Rafa Ortiz and a group of kayakers who specialise in big waterfall drops attempt to run a section of the Mexican Rio Santo Domingo that's the steepest navigable whitewater on Earth.
The natural ice track of Jyväskylä, Finland saw the racers battle their way down a 630m test of skill.
Flying a plane through a tunnel, a wingsuit flight over a volcano and a record-breaking ghost town truck jump.
Having an idea is one thing executing it is quite another. The full scope of the challenge of strongman swimming becomes apparent as Ross Edgley begins his open-water training.
To test how far his mental strength will stretch ahead of executing the strongman swimming attempt, Ross Edgley heads off to train with the Royal Marines, Britain's elite amphibious commando force.
Raw reactions show how what drives athletes is shared by their loved ones, and a wildcard shakes things up.
Aerobatic pilot Dario Costa risks it all, flying through two narrow tunnels in Türkiye.
When a shipwreck changes everything, the journey from med student to champion triathlete begins.
Jaan Roose makes history walking a 3.6km slackline across the Strait of Messina, from Italy to Sicily.
New faces challenge the veterans, and expert coaches fuel the growth of the women's field.
Urban legend no more, Sandro Dias sets two new world records skating a quarter pipe-shaped 22-storey building.
Travelling to far-away lands in search of adventure, these action sports athletes shred across otherworldly terrain. The tricks are impressive, but even more stunning are the majestic views.
Brave teams race down a 420m course in wild soapbox cars, testing engineering, courage and creativity!
Tall cars, tiny wheels and sharp turns make wildest wipe-outs when designers push the limits of creation.
Speed skater Joep Wennemars has come into his own with titles like the 1000m World Champion.
Mid-season, freeskier Mathilde must choose between ending her season early or chasing her World Cup dream.
Follow the Deviate freeski crew from the backcountry of British Columbia to the frozen streets of Minnesota.
See what makes snowboarding more than a sport as you meet local heroes, their communities and favourite spots.
Witness the dazzling trajectory of a skier who's redefining what it means to be a modern champion.
Ski resort snowboarding laps and camaraderie with Arthur Longo, Jadyn Chomlack and Cannon Cummins.