If We Built It Today Season 2: Episode Guide & Ratings

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.

Experts reveal if it's now possible to build a modern Atlantis underwater.

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.

Experts use cutting-edge tech to discover if a modern vessel of equal opulence to the Titanic could be successfully built for the sea today.

America's transcontinental railroad helped transform the United States into a global superpower, and today, cutting-edge engineering is behind hi-tech railways to once again revolutionize travel from sea to shining sea.

Experts reveal what it would take to rebuild the legendary Machu Picchu.

Experts decode the groundbreaking engineering behind the Eiffel Tower.

From ancient cave dwellings to massive multi-winged estates, the home has never stopped evolving; now, experts mix modern materials with state-of-the-art technology to reveal if a modern home can be constructed to truly stand the test of time.