Woolworth Building, swimming tank.

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

Woolworth Building, basement room over swimming tank, view from entrance.

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

Woolworth Building, switchboard.

Woolworth Building, switchboard.

Woolworth Building, engine room.

Woolworth Building, general exterior.

Woolworth Building. Pump room.

Woolworth Building. Boiler room.

Woolworth Building, boiler room.

Woolworth Building, engine room.

Woolworth Building, rendering.

Woolworth Building

Woolworth Building, vault.

Woolworth Building. Corridor on 24th Floor, Woolworth offices.

Woolworth Building, Broadway looking south.

Woolworth Building, engine room, filters.

Woolworth Building. Hall from entrance.

Woolworth Building, engine room.