Yes, prisons — and their adjunct museums — have souvenir stores.
Prison gift shops, geared toward tourists, sell the things you'd find in most tourist traps: T-shirts, key chains, hats, and mugs.
They're located at or near some of the nation's worst prisons in terms of systemic abuse, capital punishment, solitary confinement, and sexual assault.
Some are run directly by the prisons, and even prisoners; others by related museums commemorating them.
Baseball cap, Huntsville, Texas: The city, home to seven prisons and the state's execution chamber, is nicknamed the death penalty capital of the world.
"Ole Sparky" shot glasses, Huntsville, Texas: 361 Texas prisoners were electrocuted before it was ruled unconstitutional.
Texas Prison Museum, where the original electric chair is on display.
Texas Prison Museum / Via txprisonmuseum.org