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