Extras
Web Extra: The Current State of the Interstate
The once futuristic Interstate Highway System is now in need of repair.
Web Extra: The Current State of the Interstate
Web Extra: When Mules Ruled the Canal
The role played by mules that pulled barges along the Erie Canal in its early days.
Web Extra: When Mules Ruled the Canal
Web Extra: A Modern Ride on the Transcontinental Railroad
Amtrak still operates trains over portions of the original Transcontinental Railroad.
Web Extra: A Modern Ride on the Transcontinental Railroad
Web Extra: A View from the Top of the Roebling Bridge
Geoffrey goes to the top of the Roebling Bridge to learn about its engineering feats.