Unidentified street.
Unidentified subway tracks.
Unidentified track tunnel.
Unidentified elevated railroad platform.
Unidentified tunnel.
Northern section of land tunnel.
Sea Beach Line right-of-way at 21st Avenue.
Sea Beach Line and Long Island Railroad cut, north to 9th Avenue.
Sea Beach Line at 19th 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.
Eighth Avenue.
Broadway and Myrtle Avenue.
Unidentified street and railroad tracks.
Sea Beach Line, 18th Avenue, with building support.
Southbound express tunnel.
Sea Beach Line, Avenue R.
Sea Beach Line, 11th Avenue.
6th Avenue.