Lists of tunnels refer to organized collections or catalogs of tunnels located around the world, typically grouped by certain criteria, such as geography, purpose, or construction date. These lists may include various types of tunnels, such as: 1. **Transportation Tunnels**: Used for roads, railways, and subways (e.g., the Channel Tunnel, the Gotthard Base Tunnel). 2. **Hydraulic Tunnels**: Designed for water supply, drainage, or irrigation purposes (e.g.
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