The Central Artery/Tunnel Project is the largest, most complex and technologically challenging highway project ever attempted in American history. The project will dramatically reduce traffic congestion and improve mobility in one of America's oldest and most congested major cities, improve the environment, and lay the groundwork for continued economic growth for millions of New Englanders in ...

Known as one of the Seven Engineering Wonders of the Modern World, the Chesapeake Bay Bridge-Tunnel is a man-made phenomena surrounded by the natural beauty of the Chesapeake Bay. A favorite travel route and a popular tourist attraction, travelers enjoy visiting Sea Gull Island's resturant, gift shop and a 625-foot fishing pier.

Friends of Williamson's Tunnels - full information on the hidden labyrinth beneath Liverpool, England.

Images of and information about the Atlantic Avenue Tunnel in downtown Brooklyn.

4 - The Cascade Tunnel How this Tunnel was Built One of the most amazing engineering feats of the 1920's was carried out on the system of the Great Northern Railway of America when a new tunnel was driven through the giant Cascade range from Scenic to Berne. Just on eight miles were completed within three years. This work was hustled through at such speed that tunnel constructions of the past ...