Paul Niel is a restless resident of Hong Kong who previously made headlines for his breakthrough effort with wife Esther Roling to circumnavigate Hong Kong island entirely via ' coasteering ' - a combination of climbing, swimming and cliff jumping around rocky headlands. That historic effort also brought a shocking revelation: Hong Kong's coast, caves and cliffs are inundated with tonnes of rubbish that has either washed up, been blown in by typhoons or been dumped by careless people. The experience inspired him to create a new competition, combining his passion for coasteering with the desire for a shoreline free of rubbish: the Adventure Clean Up. When we began our conversation with Paul we intended to talk about the Clean Up – which will encourage teams of people to clean up the trash washed up on some of Hong Kong's once beautiful beaches and coastal areas starting at the end of April – but it quickly developed into an entirely different journey through his numerous expeditions and adventures around the world. We started off in a plastic trash-filled cave on the coast of Hong Kong, and ended up in an ancient city buried underneath the sand in Uzbekistan for 2,000 years. In between we travel to the Gobi Desert in Mongolia in search of dinosaur fossils, and we fall off a cliff in a tuk-tuk in India. Enjoy the trip! Listen and subscribe via iTunes , Spotify and Stitcher .