Part 3/12:
The dialogue transitioned into the realm of tangible modern-day underground cities, specifically focusing on Subtropolis, an extensive underground development in the United States. Formed from a limestone mine, this expansive space is currently home to various businesses, housing about 1,700 employees who perform daily tasks in a controlled 65-degree environment. The concept of a fully operational underground city not only intrigues conspiracy theorists but also raises valid questions concerning what lies beneath our feet.