Queensboro Tunnel.
Tunnel Under the New York East River
East River Tunnel, New York.
[Tunnel construction.]
[Holland Tunnel.]
[McAdoo Tunnel.]
Subway tunnel construction at Lexington Avenue and 97th Street.
The Brooklyn Subway, New York.
Unidentified tunnel.
Subways, Fourteenth Street Cut for Subway, #1.
Subways and Tunnels, Manhattan Island
[Constructing the McAdoo Tunnel.]
Northern section of land tunnel.
Southbound express tunnel.