Building Up Giants

Atlanta's Mercedes-Benz Stadium, the world's most advanced stadium, features the most complex retractable roof ever built; the team races to finish the $1.6 billion arena for the NFL season.

Expert engineers try to build one of the largest and most advanced cruise ships in the world; this goliath ship will carry over 5,000 passengers and will push the boundaries of ship design and construction.

Engineers race to complete the longest suspension bridge in the Arctic Circle before the brutal winter arrives.

Venice faces the threat of flooding if there is a powerful storm in the Adriatic; construction begins on a gigantic storm wall to save the city, but the project goes beyond protection and attempts to repair the damage that has already been done.

Copenhagen urgently needs an extended subway system, but the task proves challenging; the planned tunnels have an overall length of nearly 20 miles and the route runs just below the historic city center.

In Barcelona, Spain, the Sagrada Família has taken more than 140 years to build; today, engineers are nearing completion of the world's tallest church, designed by maverick architect Antoni Gaudí.

Engineers are breaking records as they build Beijing's tallest skyscraper, a 1,500-foot-tall behemoth designed to withstand one of the world's most dangerous earthquake zones.