East River by Henry A. Coster, in the thirty-acre estate that was purchased in 1835 by Anson Greene Phelps; towards the city, the Bull's Head cattle market fronting the Boston Post Road extended southwards from 27th Street to 23rd Street, affording a distinctly less rural aspect; the villa was removed to make way for row houses in the 1860s and the cattle market was moved farther out of town, to 42nd Street. Later development The neighborhood has been rebuilt in patches, featuring both new high-rise structures often set back from the street, and a multitude of exposed party walls that were never meant to be seen in public. A nearly forgotten feature is the private alley called Broadway Alley, between 26th and 27th Streets, halfway between Lexington and Third Avenues, reputedly the last unpaved street in Manhattan; it is not known what this alley is named after, since it is not near the main Broadway. In the 1960s and later, four Henry Phipps high-rise apartment complexes were constructed mainly on East 29th Street between First and Second Avenues, and south to East 27th Street. Historically, Phipps had been a partner of steel industrialist Andrew Carnegie. Much earlier in time, by 1940, the Madison Square Boys (and later Girls) Club, which had been located on East 30th Street just east of Second Avenue, built its own facilities on East 29th Street (back-to-back with its older facility). In the 1990s, the Club sold its facility to the Churchill School and Center, and moved its office in the Empire State Building. There are two large apartment buildings in the neighborhood named Kips Bay Towers, which are part of a 1,112-unit complex completed in 1963 and designed by architect I. M. Pei. Built on a pier above the East River between East 25th and East 28th Streets is Waterside Plaza, which includes residential towers and the United Nations International School. There were plans to build additional above-water apartments, offices, and a hotel in the 1980s, but environmental concerns and community opposition doomed the project. Today, the waterfront south of Waterside Plaza is Stuyvesant Cove Park. The park includes a small man-made land mass extending out into the East River, which was created from excess cement dumped into the river. Demographics For census purposes, the New York City government classifies Kips Bay as part of a larger neighborhood tabulation area called Murray Hill-Kips Bay. Based