underground passages
Buried travel routes
Underground passages are tunnels or corridors beneath the earth's surface, connecting buildings, rooms, or locations.
They serve purposes from practical to secretive: subway tunnels, mining shafts, smuggling routes, or escape corridors.
The castle had underground passages leading to the river.
Secret underground passages figure prominently in gothic fiction and adventure stories.
- caveUnderground hollow in rock
- lava tubeVolcanic drainage tunnel
- catacombUnderground cemetery passage
- burial chamberRoom for interring remains
- burrowAnimal's dug dwelling
crypt · escape tunnel · subterranean river · aqueduct · drainage canal · rabbit warren · rat hole · bomb shelter · grotto · sinkhole · crevasse · fissure · mine shaft · sewer · storm drain · tunnel · subway · wine cellar
- undergroundsubterranean, cave systems, tunnels, tunnel, tube
- urban infrastructurepower grid, parking lot, highway, water supply, sewage system
- tunnelstunnel exit, portal, bore, TBM, tunnel boring
- old townscobblestones, narrow streets, town square, town squares, medieval streets
underground passagesskyways
Elevated enclosed passages
overpasses · elevated railways · surface streets · footbridges · viaducts
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