Seasons & Episodes
Bridges
How does a bridge withstand the forces of nature and traffic? Host David Macaulay takes viewers from the stone arch brid
Domes
How does a dome support itself? Ever since the Roman Emperor Hadrian topped his Pantheon with a dome, this roof-with-cla
Skyscrapers
What does it take to erect a skyscraper 100 stories tall? From the medieval towers of Italy's San Gimignano to today's r
Dams
How does a dam resist the crush of millions of gallons of water? Host David Macaulay surveys the dam -- the biggest, cos
Tunnels
What keeps a tunnel from collapsing? Tunnels have advanced from dangerous, claustrophobic passages to spacious, safe sub
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