Ключевые слова: beneath, bore, bridge, burrow, carved, cavern, cavity, channel, chiseled, conduit, construction, dig, earthwork, engineering, entrance, excavation, geology, highway, hollow, hollowed, infrastructure, interior, metal, modern architecture, mountain, passage, passageway, pathway, road, route, steelway, subcutaneous, sublevel, submontane, subterranean, subterraneous, subway, thoroughfare, throughway, transit, transport, transportation, tube, tunnel, underground, underneath, underpass, urban design,