[Advertising Club of New York, 23 Park Avenue.]

[Advertising Club of New York, 23 Park Avenue.]

[11 East 73rd Street.]

[Interborough Rapid Transit Company powerhouse.]

[680 Park Avenue.]

[Racquet and Tennis Club, 370 Park Avenue.]

[Metropolitan Club, 1-11 East 60th Street.]

[Washington Arch.]

[68th Street façade of 680 Park Avenue.]

[Bulldog emblem on the American Express Horse Stables, Hubert Street façade.]

[972-973 Fifth Avenue.]

[Racquet and Tennis Club, 370 Park Avenue.]

[Racquet and Tennis Club, 370 Park Avenue.]

[Hall of Fame for Great Americans.]

[The Century Association, 7 West 43rd Street.]

[The Century Association, 7 West 43rd Street.]

[The Century Association, 7 West 43rd Street.]

[Interborough Rapid Transit Company powerhouse.]

[Aerial view looking southeast over Washington Arch.]

[Liberty Tower, 55 Liberty Street.]