As many of us already know, New York City today is barely recognizable when compared to how it was circa 1960. Streets, houses and entire neighborhoods have been renovated, altered or developed in such a way that boggles the mind of anyone old enough to remember the city that was. A brownstone on West 94th Street between Central Park West and Columbus Avenue, however, has stood the test of time and, through meticulous nurturing, skyrocketed in value. The Upper West Side house, originally bought in 1960 for $18,000 by author Peggy Mann Houlton and her husband William Houlton, is now worth upwards of $5 million.