An inside look at the incredible engineering behind America's most notable structures, including the Washington Monument, the Statue of Liberty, Mount Rushmore, the Golden Gate Bridge, the Empire State Building, Alcatraz, and the 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.

The seven wonders of ancient Egypt are home to mysteries still unsolved thousands of years after their construction. Today, investigators use cutting-edge tech and forensic analysis to reveal new secrets of these colossal engineering marvels: the Great Pyramid of Giza, the Sphinx, the Temple of Karnak, the Valley of the Kings, Abu Simbel, the Obelisks, and the Lighthouse of Alexandria.

America before Columbus was home to some of the greatest engineering marvels on the planet: Chichen Itza, the Statues of La Venta, Tikal, Machu Picchu, Cusco's Temple of the Sun, the Nazca Lines, and the Moai of Easter Island. Special access to hi-tech archaeological digs reveals the secrets of ancient America's Seven Wonders as experts investigate their mysterious purposes.