This is the least interesting part of what was once the largest system of fortifications in the world, and in any case you can't get in to see it.
It is open to the public everyday for 12 hours.
mnli hypothesis: It is open to the public everyday for 12 hours. premise: This is the least interesting part of what was once the largest system of fortifications in the world, and in any case you can't get in to see it.