[McAdoo Tunnel.]
[Constructing the McAdoo Tunnel.]
McAdoo Tunnel under North River, New York
Building the McAdoo Tunnel, Under the Hudson River, New York.
[William McAdoo.]
[Cheering parade of delegates after nominating McAdoo for president.]
[Subway tunnel.]
[Holland Tunnel.]
[Tunnel construction.]
[North tunnel shield.]
Unidentified tunnel.
The Holland Tunnel
Unidentified track tunnel.