Lincoln castle, Three great attractions and a fabulous great day out. Medieval Wall Walk. Victorian Prison. Magna Carta. Enjoy spectacular views across Lincolnshire from our completed Medieval Wall Walk. Visit the David P.J. Ross Magna Carta Vault and see one of only four remaining original Magna Carta along side the Charter of the Forest. Immerse yourself in the lives of prisoners and their daily routines in the Victorian Prison and see the unique separate system chapel. 1000 years of history