Presents a history of the Eiffel Tower, discussing the public controversy the tower sparked, the designer Alexandre-Gustave Eiffel, and the technological challenges faced in constructing the tower.
Examines the challenges faced by designers and builders of medieval castles, discussing how they were used, notable structures, and defending the castles from invaders.
Discusses the origins and construction of Roman roads and aqueducts, services and amenities along the roads, public water supplies, and what remains of Roman systems today.
