 Some of his more notable accomplishments as mayor were the inclusion of San Juan into President Lyndon Johnson's Model Cities Program, which changed the face of the slum called "El Fanguito" to become the area of the "new" San Juan where modern facilities such as the San Juan Natatorium, the Puerto Rico Coliseum and numerous residential condominium projects were eventually built; the construction of the Roberto Clemente Coliseum and the first municipal educational institution of Puerto Rico