We almost DIE exploring Sydneys Secret Underwater Tunnel - Freediving Danger

Hidden in plain sight under Australia’s busiest harbour is Sydney’s secret underwater tunnel. So top secret infact that there is no history or historical record of its existence. The entrance is dark and overgrown with kelp, so you can be forgiven if you dare not explore what lays within... On a mission to test the new Olight Perin CHECK IT OUT HERE 👆 This is Monni’s first cave diving experience... And just might have almost been her last. Big swell and surge created a perfect storm inside this underwater tunnel we weren’t expecting. Head over to To follow more of our adventures!