For NASA to send a person Mars, they will need to build the most powerful rocket ever built. Discover inside story behind the Orion Space Craft, an engineering feat designed to sustain astronauts for years in one of the universe's harshest environments.

How did engineers build the tallest bridge on the planet? As tall as a skyscraper, the Millau Viaduct braves deadly wind speeds over an immense abyss, and we go inside the story behind this modern wonder.

The ATandT Stadium in Texas is home to the Dallas Cowboys and the world's largest retractable roof. This $1.2 billion stadium can house over 100,000 fans, and we'll go inside how this engineering feat was built.

Go inside the largest cruise ship on the planet: a massive ship that's 1,181 feet long and a staggering 227,000 tons.

The Virginia Class is one of the most advanced nuclear powered, fast attack submarines ever produced for the US Navy. These technological titans are almost 400 feet long, and weigh a staggering 7,800 tons.

A 73-story glass skyscraper in London is an engineering marvel. 11,000 exterior glass panels form this mega tower's façade. It's colossal concrete core supports luxury apartments, a hotel, and nearly 600,000 square feet of office space.