Claim: There is an underground passageway called Connaught Tunnel.
Evidence: For the Connaught tunnel in East London , England , see Eastern Counties and Thames Junction Railway	Eastern Counties and Thames Junction Railway	Eastern Counties and Thames Junction Railway	tunnel	tunnel	Connaught	Connacht
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A tunnel is an underground passageway , dug through the surrounding soil/earth/rock and enclosed except for entrance and exit , commonly at each end.