Did alligators ever really live in New York's sewers? What's it like to explore the old aqueducts beneath the city? How many levels are beneath Grand Central St

New life underground -- Modern necropolis -- Charon's bark -- Urban apocalypse.

This book gives an account of features below London: railways, old and abandoned tunnels, security bases, cables, utility supplies, pneumatic tubes, crypts and

In Subterranean Twin Cities, geologist, historian, and urban speleologist Greg Brick takes us on an adventurous, educational, and-thankfully-sanitary journey be