Shaded by graceful gingko trees, this street has 15 classic Italianate brownstone and brick town houses (1852-53). Novelist Theodore Dreiser wrote An American Tragedy at No. 16, and poet Marianne Moore resided at No. 14. Mayor Jimmy Walker (first elected in 1926) lived at No. 6; the lampposts in front are "mayor's lamps," which were sometimes placed in front of the residences of New York mayors. This block is often used as a film location, too: No. 12 was shown as the Huxtables' home on The Cosby Show (although the family lived in Brooklyn), and No. 4 was the setting of the Audrey Hepburn movie Wait Until Dark. Before 1890 the playground on the south side of the street was a graveyard where, according to legend, the dauphin of France -- the lost son of Louis XVI and Marie Antoinette -- is buried. Subway: 1, 9 to Houston St.