Is this the toughest prison in Minecraft?

Welcome to the RAFT correctional facility, located in the east river. This supermax facility is designed to hold the most dangerous mobs and griefers in the game! Cells are encased in bedrock and all commands and cheats are disabled for prisoners so there is no way out. Contact with the outside world of the overworld is minimal to none. The only view of the outside is a tiny slit which allows only a small amount of natural light into the cell and points to the sky so it’s practically impossible to plan an escape by knowing your location in the facility.