"Cities of the Underworld" is a television series that explores the hidden underground spaces and structures beneath some of the world's most famous cities. The show delves into the historical and cultural significance of these hidden places, and reveals how they have played a role in shaping the cities above ground.

Each episode focuses on a different city, such as Rome, Paris, or London, and showcases the tunnels, catacombs, and other subterranean structures that exist beneath them. The show also examines the various uses that these spaces have served over the years, including as hiding places during times of war, as storage facilities for goods and supplies, and even as sites for secret societies and cults.

The series is an entertaining and informative look at the often-overlooked spaces that exist beneath our feet, and provides a fascinating glimpse into the history and culture of some of the world's most iconic cities.

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