Though he's no stranger to life behind bars, Raphael Rowe concedes that Costa Rica's La Reforma Prison is certainly among the most intimidating.

While spending a week inside Bogotá's fortress-like prison, Raphael Rowe must negotiate the oppressive atmosphere and deal with an ominous threat.

Raphael Rowe spends a week at a maximum security prison in Craiova, Romania, where the inmates include rapists, murderers and contract killers.

Many prisons aim to punish and demean inmates. Norway's Halden Prison -- as Raphael Rowe is about to see for himself -- does things differently.