[Queensboro Bridge under construction.]

[Construction of Pennsylvania Station.]

[Tunnel construction.]

Pennsylvania Tunnels - Two of the Long Island Portals.

Pennsylvania R.R. under the Hudson River, New York City.

Pennsylvania Tunnels, Interior Showing Signal Apparatus.

Midtown Tunnel under Hudson River, April 24, 1935

[Tunnel construction.]

Pennsylvania R. R. under the Hudson River, New York City.

[Constructing the McAdoo Tunnel.]

Pennsylvania R. R. under the Hudson River, New York City.

Interior of Pennsylvania Tunnels, New York.

[Woolworth Building under construction.]

[Holland Tunnel.]

[Fifth Avenue Building.]

[Holland Tunnel.]

The Weehawken Ferry Story [Railroad tunnel.]

Building the McAdoo Tunnel, Under the Hudson River, New York.

View in the Hudson & Manhattan R.R. Company's Tunnel. Under the Hudson River.

Hudson River Tunnel Curve, New York.