Mike Corey visits the lakeside town of Epecuen, a former Argentine tourist resort which has lain submerged beneath a lake for 30 years and is now in the process of re-emerging. The team meets the Maori custodians for one of New Zealand’s most isolated rainforests, and adventurer Jason Lewis and his wife Tammie set off on their attempt to circumnavigate Wales using only human power – on foot, bike, kayak and pedal boat.