With roots dating to the late 19th century, Pittsburgh-based U.S. Steel has produced the materials used for everything from the nation's bridges and skyscrapers to its tanks and battleships.

Royal Caribbean's Icon of the Seas is the largest cruise ship in the world. But are these mega-ships getting too big?

The 214-foot 'Creole' is the world's largest wooden sailing yacht and has served the Gucci family longer than any of its ...