Woolworth Building, engine room from S.W. corner looking west.

Woolworth Building, engine room from S.W. corner looking N.E.

Woolworth Building, engine room looking S.W.

Woolworth Building, boiler room from S.W. corner.

Woolworth Building, sub-basement engine room from S.W. corner looking N.E.

Woolworth Building, exterior from S.W. corner.

Woolworth Building, sub-basement from N.E. corner room from S.W. corner.

Woolworth Building, engine room from S.E. corner.

Woolworth Building, engine room from S.E. corner.

Woolworth Building, from N.E. corner looking S.W.

Woolworth Building, engine room from N.W. corner.

Woolworth Building, basement large room, S.W. corner view from east end.

Woolworth Building. Engine room from S.E. corner.

Woolworth Building, engine room from S.E. corner.

Woolworth Building, sub-cellar S.W. corner.

Woolworth Building, detail S.W. corner Barclay Street.

Woolworth Building, sub-basement swimming pool from S.W. corner.

Woolworth Building, from Broadway looking S.W.

Woolworth Building, Broadway N.E. corner. looking S.W.

Woolworth Building, engine room N.E. corner.