word sleuth

This is a theme puzzle with the subject stated below. Find the words listed in the diagram. They run in all directions - forward, backward, up, down and diagonally. Abu Ghraib Alcatraz Attica

Elmira Folsom Hanoi Hilton Insein

Joliet La Santé Leavenworth Marion

Sing Sing St. Helena Tadmor

The Bastille Famous Prisons Previous unlisted clue: FILLINGS Today's unlisted clue hint: THE — OF LONDON