Episode 3

Justin uncovers the truth behind a catastrophic landslide that wiped out a Turkish ski jump resort, before jetting off to Gibraltar to see one of the craziest airports in the world – where the runway has been built right across a main road. In Mexico City, reporter Jimena Gascón joins a diving team with the unenviable job of unblocking the city’s sewers. She then journeys deep underground to see how they’re building the world’s biggest sewage pipe. Also, Daniel Lefevre heads to Santos, Brazil, to determine why a hundred buildings are leaning over and in danger of collapse.