01. Buildings
A look at 10 of the world's most remarkable buildings, including a skyscraper in earthquake-prone Mexico City, the world's biggest building and, in Norway, the world's tallest timber building.
02. Nature
An exploration of nature's deadly forces, from huge underwater canyons that funnel massive waves, to a bridge built from living trees, and Europe's little-known supervolcano, which could kill millions.
03. Living on the Edge
This episode examines how humans can thrive in harsh locations, from the world's highest town to a desert town in California with no rules, and an upside-down town in the Australian outback.
04. On the Road
This high-octane episode reveals the most incredible vehicles from across the globe, from a bulletproof storm-chaser to the world's biggest terrestrial vehicle, which weighs in at 14,200 tonnes.
05. In the Air
This episode checks out incredible flying. Daredevil Scotty Bob dons a wingsuit and flies inches from sheer rock. Plus: helicopter herding, solar planes, space delivery services and more.
06. In the Water
This episode showcases marvels of marine engineering, from the part-plane, part-boat Airfish to the world's largest vessel. And Australian David Warby attempts to break the world water speed record.