Sea Beach Line at 5th Avenue.

Sea Beach Line, Avenue R.

Sea Beach Line, 11th Avenue.

Sea Beach Line and Long Island Railroad cut, northwest to near 11th Avenue.

Sea Beach Line, 18th Avenue, with building support.

Sea Beach Line and Long Island Railroad cut, north to 9th Avenue.

Sea Beach Line and Long Island Railroad at 5th Avenue, looking west to 4th Avenue.

Right-of-way on portal.

Sea Beach Line and Long Island Railroad cut, north near 11th Avenue.

9th Street in Brooklyn.

Opposite Trinity Cemetery.

Unidentified street and railroad tracks.

Central Avenue bridge.

Sea Beach Line at 19th Avenue.

Sea Beach Line right-of-way at 21st Avenue.

Man inside the southern end of a river tunnel.

Ring #97 Northbound Express tunnel.

Unidentified subway tracks.

32nd Street and Broadway.

Shaft No. 4, Steinway Tunnel.