Kaczynski was flown by jet from Sacramento, Calif., to be greeted by twelve-foot fences topped with razor wire and a cell with a concrete bed. He began serving four life sentences plus 30 years on Tuesday for a bombing spree that left three dead and 29 injured.
The 55-year-old mathematician was sentenced Monday under a plea bargain that spared him a possible death sentence.
Kaczynski joins Oklahoma City bomber Timothy McVeigh; Ramzi Yousef, mastermind of the World Trade Center bombing; and Charles Harrelson, the hitman father of the Cheers sitcom star Woody Harrelson.
The high-security federal prison opened in 1995 in this town of 3,500 people, about 100 miles southwest of Denver.
Kaczynski, like all newcomers and prisoners deemed dangerous, was placed in solitary confinement. The cell he will live in is made of poured concrete and steel; there are no knobs or buttons on the shower or toilet that he could possibly take apart and use as a weapon.
He will be locked down 23 hours a day in a 12-by-7-foot cell designed so that inmates cannot make eye contact with other prisoners or see anything except walls and sky. Solitary confinement inmates cannot go to the library or the dining room or attend religious services.
A courtroom inside the prison ensures inmates never have to leave the grounds.