How does a cruise ship containing 18 decks and 6,000 guests stay afloat? How was the world's heaviest man-made structure built? Which construction can hold the most football fans in the world? The second season answers these questions, and more.

Since their spectacular rise in the 19th century, railroads have been at the cutting edge of engineering and technology and that remains true, even today. Extreme Railroads shines a light on the world's most extraordinary rail systems, including New York's Arthur Kill Vertical Lift Bridge, Japan's Bullet Train and California's Central Pacific Railroad.

The new season includes Hudson Yards Project, a large-scale redevelopment program; the New Safe Containment being constructed around Chernobyl's damaged nuclear reactor; the Gerald R. Ford-class aircraft carriers, the largest warships ever designed, are currently being built and will introduce the Electromagnetic Aircraft Launch System, which will launch aircraft with a state-of-the-art catapult system; and the London Array, the largest offshore wind farm on the planet.