Rugby meets mixed martial arts in the brutally violent calcio storico, a traditional sport of Florence, Italy, that dates back nearly 500 years
Scotland's Highland games combine a cultural celebration with challenging athletic tests of strength - including the famous caber toss
For many in the Philippines, freediving without oxygen is a way of life. It's also a demanding sport that pushes the limits of the human body.
In Austin, Texas skaters find an inclusive and supportive community in roller derby, a competition that blends high speed and physical combat.
In Kyrgyzstan, players throw themselves into the national sport of kok boru, a rough pololike game played on horses - with a dead goat as a ball.
Professional wrestling in the Congo mixes athleticism and showmanship, but adds a layer of voodoo mysticism that makes it unlike anything else.
Unique to Bali's Jembrana region, Makepung Lampit puts its own spin on drag racing. The vehicle is a water buffalo, the track is a flooded rice field
Athletes have competed in Pehlwani wrestling contests for centuries in India. Now women are competing in an arena once reserved for men.
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