An introduction to the construction of the Great Wall of China, discussing construction techniques, the dynasties that constructed it, and how the modern Chinese government is working to protect it for the future.
An introduction to the construction of the Eiffel Tower, discussing designer Gustave Eiffel, how workers assembled it, and how maintenance crews keep it standing today.
An introduction to the construction of One World Trade Center, discussing skyscraper construction techniques, and the neighboring memorials to the original World Trade Center skyscrapers.
