tunnel
From Underfoot Expounder
Q44377
underground passageway
Wikimedia, Wikidata
subpage, thoroughfare, underground structure, mine opening, underwater tunnel, secret passage, ski tunnel, helical tunnel, dive-under, road tunnel, combination tunnel, base tunnel, urban tunnel, Roman tunnel, smuggling tunnel, canal tunnel, sough, submerged floating tunnel, supply tunnel, hood tunnel, cable tunnel, escalator tunnel, driveway, breport, water tunnel, cut and cover tunnel, glacier tunnel, rescue tunnel, military tunnel, pedestrian tunnel, cycling tunnel, international tunnel, watercourse tunnels, freight tunnel, underground buildings, drive-through tree, vertex tunnel, group of tunnels, geographical feature