In 1926, Cuba saw the construction of the Presidio Modelo, a prison based on the Panopticon building design. The idea was that a guard could stand in the central tower and watch all of the prisoners in the surrounding cells.
Top image by Friman via Wikimedia Commons.
Presidio Modelo was built under the administration of Gerardo Machado and consisted of five cylindrical cell blocks. It was inspired by the Panopticon institutional buildings conceived by social theorist Jeremy Bentham, although it was extremely difficult for prisons of the time to fulfill all the goals of the Panopticon, namely that while the prisoners could be watched at all times, the prisoners themselves could not see their custodians and thus did not know when they were under surveillance. Presidio Modelo was still in use under Fidel Castro, and became severely overcrowded within a few years of Castro's revolution, and, despite the surveillance model, was the site of multiple riots. In 1967, the Cuban government shut down the prison, which now stands as a monument and a museum.
You can see more photos of the prison on imgur.
Presidio Modelo a panopticon prison built on Isla de la Juventud in Cuba [r/AbandonedPorn via Nerdcore]