Queensboro Tunnel.
Tunnel Under the New York East River
The Brooklyn Subway, New York.
[Tunnel construction.]
[Holland Tunnel.]
East River Tunnel, New York.
[McAdoo Tunnel.]
Subway tunnel construction at Lexington Avenue and 97th Street.
[Digging subway tube under East River for Queensboro Subway.]
Unidentified tunnel.
[North tunnel shield.]
Subways, Fourteenth Street Cut for Subway, #1.
Subways and Tunnels, Manhattan Island
Unidentified track tunnel.
[Constructing the McAdoo Tunnel.]