Modern Marvels

A spectacular roadway some 120 miles long, the Overseas Highway links mainland Florida with the Florida Keys, and contains 51 bridges, including the Seven-Mile Bridge. Explore its remarkable history and design.

New Orleans' Lake Pontchartrain Causeway is an engineering marvel: Two ribbons of concrete span the largest inland body of water in Louisiana, and at nearly 23.87 and 23.88 miles long, form the world's longest automobile bridge.

This is the story of the Columbia, the first shuttle to fly to outer space, from inception to tragic demise in January 2003.