adit
horizontal entrance shaft to an underground mine
Argo Tunnel
mine drainage and access tunnel in Idaho Springs, Colorado
Stollen
cultural heritage monument D-4-79-166-87 (0) in Weißenstadt, Bavaria
Deep Tunnel
passage to a mine near Freiburg, Germany
Adit Josef
gold mine in Central Bohemian Region
main adit level
adit for water evacuation and air ventilation for connected mine workings
Friedrich Mine Deep Adit
adit in Poland
penstock
enclosed pipe that delivers water to hydroelectric turbines or sewerage systems
Great County Adit
series of interconnected drainage adits in Cornwall, England
Sutro Tunnel
historic site
Friedrich-Wilhelm-Stollen
cultural heritage monument D-4-75-146-19 (0) in Lichtenberg (Oberfranken), Bavaria
Stollen
cultural heritage monument D-6-71-153-16 (0) in Sommerkahl, Bavaria