3. Lincoln Correctional Facility 31 W 110th Street
The Lincoln Correctional Facility is a state prison, blending in perfectly on 110th Street on the border of Central Park. The only signs differentiating it from a pre-war apartment building are the blocked windows. This prison has housed Malcolm X’s killer Thomas Hagan and was formerly the headquarters of the Young Women’s Hebrew Association. It has also served as a Army Housing and a school.