An inside look at the incredible engineering behind America's most notable structures, including Washington Monument, Statue of Liberty, Mount Rushmore, Golden Gate Bridge, Empire State Building, Alcatraz, and World Trade Center Twin Towers. These are some of the most impressive monuments in the United States – matching the engineering feats of the Seven Wonders of the Ancient World.

America before Columbus was home to some of the greatest engineering marvels on the planet; special access to hi-tech archaeological digs reveals the secrets of ancient America's Seven Wonders as experts investigate their mysterious purposes.