Most Important Structures in this Category
- entry with pictures
- new entry (30 days)
- updated entry (14 days)
| # | Name | Country | length |
|---|---|---|---|
| 1 | Päijänne Water Tunnel | Finland | 120000 m |
| 2 | Orange Fish Tunnel | South Africa | 82800 m |
| 3 | Gotthard Base Tunnel | Switzerland | 57091 m |
| 4 | Seikan Tunnel | Japan | 53850 m |
| 5 | Emscher Sewage Canal | Germany | 51000 m |
| 6 | Channel Tunnel | France | 50450 m |
| 7 | Hálslón Headrace Tunnel | Iceland | 39700 m |
| 8 | Lötschberg Base Tunnel | Switzerland | 34576.6016 m |
| 9 | Koralm Tunnel | Austria | 32893 m |
| 10 | Guadarrama Tunnel | Spain | 28418.66 m |
Note: there are too many entries in this category and all its subcategories combined. To obtain a list of structures please go through one of the subcategories.

















