Space Station Breathtaking engineering triumphs hidden inside the International Space Station make it the most innovative and expensive superstructure ever built. Ultimate Cargo Ship We take apart the GPO Amethyst, an ocean transporter capable of carrying some of the largest structures by deliberately sinking into the ocean. Monster Plane This episode uncovers the innovations that enable the world’s largest plane, the unique Antonov AN-255, to carry the world’s heaviest air freight. Tallest