Photo journal: Inside a Bolivian jail

"I have been an outcast since I was a child. My life was spent in correctional centres. I was sent there 27 times," says Victor Calatayud, aka El Pecos, in the Los Alamos sector.

"This is my eighth time here. I know this place so well that I have written a guide to it, including its history, anecdotes, and even a guide to prison jargon."

Tourists used to be allowed in, but the tours were stopped because many people were coming to buy cocaine, said to be the purest in Bolivia.