Explore beneath New York City, a living, breathing complex of engineering, history, and secrets that could only exist in America's largest city.

Naples, Italy narrowly escaped meeting the same fate as its neighboring city, Pompeii in 79 AD when Mount Vesuvius wiped out everything around it. The wind saved Naples that day, but life in the shadow of this massive volcano is unlike any other--and so is it's underground. Explore the neighborhoods, banks, bakeries, and other structures carved beneath Naples by ancient Neopolitans.