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. 

The Eiffel Tower stands as the ultimate symbol of Paris and an innovative form of engineering that had never been achieved; now, architects reveal how this groundbreaking design holds the key to constructing the world's tallest skyscrapers of the future. 

Machu Picchu is one of the greatest landmarks of world architecture, yet the purpose of its construction and how it was built still remains a mystery; experts use cutting-edge engineering to reveal what it would take to rebuild this legendary city.

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. 

The Titanic pushed the boundaries of engineering and luxury like never before, but it's also the most well-known disaster; experts use cutting-edge tech to discover if a modern vessel of equal opulence could be successfully built for the sea today. 

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. 

For more than 2,000 years, explorers have searched for any trace of the legendary Utopian civilization that sank beneath the ocean. Now, experts imagine what would happen using modern engineering to build an underwater megacity for a modern-day Atlantis. 

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.