World's Most Extreme

A look at the 10 most extreme and dangerous waterways in the world. Borrowed by mariners, drug traffickers, explorers and adrenaline buffs, these waterways can put lives at risk and push us to design amazing projects.

A look at the most dangerous and extreme roads in the world, including a Russian highway decimated by mud each year, and an avalanche prone Chinese-Tibetan road.

Reviews the world's 10 most extreme bridges, ones that demonstrate extreme engineering and stand in some unforgettable locations.

Explores the 10 most extreme tunnels on Earth, from the Swiss Alps to a Japanese metropolis, where they serve as places of refuge in a crisis but also tend to be deep and menacing, turning into scenes of disasters.

From India to Japan, Peru and the Philippines, railways mean magnificent engineering in extreme environments.

A look at the craziest airports connecting all the corners of the world, from the South Pole to Hong Kong. Plus, how the daring pilots navigate the risky airports to land their planes safely.