Woolworth Building. Swimming tank.

Woolworth Building, swimming tank.

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

Woolworth Building, swimming tank from S.E. corner.

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

Woolworth Building, basement from N.E. corner looking west.

Woolworth Building, sub-basement central section, boiler room.

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

Woolworth Building. Hall from entrance.

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

Woolworth Building, boiler room.

Woolworth Building. Engine room.

Woolworth Building, engine room.

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

Woolworth Building, sub-basement, coal bunkers from east end.

Woolworth Building, basement from N.W. corner looking east to Park Place.

Woolworth Building, view from N.E. corner.

Woolworth Building, sub-basement midway between boiler and engine room looking east.

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

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