Impossible Engineering - Season 6

When engineers built railroads across the swamps of New Orleans, they used cutting-edge technology and methods to get it done, and these extreme trains attest to the innovative engineering required to conquer the most challenging water environments.

The first railroads in the United States were engineering marvels built to conquer America's deadliest places. Using cutting-edge science, engineers and builders changed the nation by connecting the California frontier with the rest of the country.

When engineers built a cutting-edge railroad to navigate the South American Andes, they used cutting-edge tech and engineering to conquer its deadly heights. This trailblazing train sets new records on one of the most dangerous routes in the world.

Experts use cutting-edge tech and bold engineering to build a record-breaking bridge that spans a deadly chasm in a remote section of the Himalayas. When completed, it will be the world's tallest railway bridge, towering almost 1,200 feet high.

New York City is building an 11 billion dollar construction project to extend the busy Long Island Railroad, and using brand-new technology, engineers and builders blast bedrock to create a vast tunnel below Grand Central Terminal.

Engineers at Virgin are building the world's first hyperloop train system, an innovative high-speed technology that uses magnetic levitation to travel over 600 miles per hour and transform transportation as we know it.