National Geographic: Megastructures (Box Set) (2006)

Take a ride on a new breed of super helicopter that can reach speeds of over 300km per hour. Explore a 23-storey deep sea oil rig that can drill 10 kilometres into the earths crust. Come on board a submarine that can drop its 118 crew members to sea depths that would instantly kill a human. These are machines of the 21st century and they have revolutionised the fields...