323 West 74th Street

It doesn't get any grander than this 11,500-square-foot, six-story mansion on the Upper West Side. Located at 323 West 74th Street, this home has an interesting history, to say the least: It was designed by the famous architect C. P. H. Gilbert as part of a larger row of residences off Riverside Drive to rival the mansions of Fifth Avenue. The infamous moneyman and steel magnate Charles Schwab lived here from 1914 to 1917, then, according to Daytonian in Manhttan, it was used as the "scandalous love nest" for the mistress of industrialist George Gould. Today, it's been configured as an owner's triplex with an apartment below. The asking price comes in at $19.995 million.
See more interior photos here