Unidentified tunnel.

Unidentified track tunnel.

Northern section of land tunnel.

Unidentified subway tracks.

Southbound express tunnel.

Unidentified street.

Unidentified railroad tracks.

Unidentified elevated railroad platform.

Subway tunnel construction at Lexington Avenue and 97th Street.

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

Sea Beach Line at 19th 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 cut, north near 11th Avenue.

Sea Beach Line, Avenue R.

Sea Beach Line, 11th Avenue.

Smith and Union Streets.

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

Ring #97 Northbound Express tunnel.

Eighth Avenue.