Washington, DC was built as the capital city of a new, revolutionary country, and it's home to some of America's greatest wonders; now, experts use cutting-edge engineering to reimagine what this place would look like if we had to build it again.

The Parthenon is the crowning jewel of ancient Greek architecture engineered according to a mysterious mathematical formula, the golden ratio; expert builders examine the secrets of its design and investigate if modern-day methods could rebuild it.