The Museum-Reserve Izborsk manages the fortress and the wider historical landscape, and its exhibitions help make sense of what would otherwise be a handsome but confusing scatter of walls, springs, crosses, and earthworks. The displays cover local archaeology, defence architecture, and the village's place on the Pskov frontier.
It is not a large museum, but it is useful before walking out to the springs and Truvorovo Gorodishche. Check opening hours locally; regional museums in Russia can keep irregular schedules outside summer.