Inside the World's Toughest Prisons

Traveling to Moldova, Rapheal Rowe locks himself inside Penitentiary 17, a maximum-security prison housing more than 100 inmates with life sentences.

The Central Jail of Nicosia in Cyprus undergoes radical transformations over the years; a look at whether these changes are for the better.

Raphael Rowe visits Zenica prison in Bosnia-Herzegovina, where he encounters inmates, including organized crime bosses and killers.

Raphael Rowe investigates one of Greece's most overcrowded maximum-security prisons, overflowing with some of the country's most dangerous offenders.