Thirty-First Parallel

Historical marker location:

Kentwood, Louisiana

( Marker is on Interstate 55 at milepost 1,, 1 mile south of State Line, on the right when traveling south.)

Marker installed: 1975

The Louisiana State Penitentiary, commonly known as "Angola," is one of the largest maximum-security prisons in the United States. It is named after the former plantation on which it was built, and it is known for its extensive agricultural operations.