Unidentified tunnel.
Northern section of land tunnel.
Unidentified track tunnel.
Unidentified subway tracks.
Southbound express tunnel.
Unidentified street.
Unidentified railroad tracks.
Sea Beach Line right-of-way at 21st Avenue.
Unidentified elevated railroad platform.
Sea Beach Line at 19th Avenue.
Sea Beach Line, Avenue R.
Sea Beach Line, 11th Avenue.
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 and Long Island Railroad cut, northwest to near 11th Avenue.
Ring #97 Northbound Express tunnel.
Subway tunnel construction at Lexington Avenue and 97th Street.
Central Avenue bridge.
Sea Beach Line, 18th Avenue, with building support.