Harper's Weekly reported in 1857 that no engineer had yet been able to present a feasible plan for Central Park and that "it may not ever happen." Their pessimism was misplaced, as Frederick Law Olmsted and Calvert Vaux's Greensward Plan was approved in May 1858. By 1860, visitors were enjoying the magnificent new park's naturalistic splendor. Central Park quickly became one of New York's premier attractions, featuring the menagerie, the mall, Bethesda...