Part 12/16:
The Plzeň underground, one of Central Europe's longest tunnel networks, initially served practical purposes such as storage and transport. Today, it’s integral to Plzeň's brewing history, embodying both practical and cultural significance.
Metropolitan Area Outer Underground Discharge Channel, Japan
Tokyo's sophisticated flood defense system includes the Metropolitan Area Outer Underground Discharge Channel, one of the world's largest flood diversion facilities. This engineering marvel is designed to handle catastrophic flooding scenarios and climate-induced disasters.