How does a dam resist the crush of millions of gallons of water? Host David Macaulay surveys the dam -- the biggest, costliest structure of all -- from Hoover's concrete arch confronting the Colorado River to the Aswan High Dam, a veritable underwater mountain sitting on the Nile riverbed, holding back a lake the size of England.

How does a dome support itself? Ever since the Roman Emperor Hadrian topped his Pantheon with a dome, this roof-with-class has been the prestige building form. Big domes cover civilization's most revered structures, from great cathedrals to mosques to houses of government. Host David Macaulay uncovers the tricky technology of domes, from the Pantheon to the geodesic marvels of Buckminster Fuller and beyond.

This animated program centers on a small New England community similar to Pawtucket, Rhode Island, where Samuel Slater established America's first textile mill. Live action hosted by David Macaulay, takes viewers from Manchester, England, to Lowell, Massachusetts, explaining technological changes that transformed the making of textiles, a key component of the Industrial Revolution sweeping across Europe and America in the late 18th century.

How did ancient Egyptians build the Great Pyramid at Giza, joining two million blocks of heavy stone with amazing precision? Who were the leaders who built these enormous structures, and what did these tombs signify? Host David Macaulay explores the history, mythology, and religions of Egypt's people, combining live footage and animation. Take a rare look at the mummy of Ramses II and buried treasure in the sacred Valley of the Kings.