Main tunnel

Through this tunnel you could get directly to the main ditch around the Redoubt but there is a little problem - the gate is locked. Nothing bad, we will find the other way (© as Vladimir Lenin have said in the old times), it is not the first time when I try back ways...
Generally speaking, you can get inside of the Redoubt as part of tours group on Sundays (alas, but today is Saturday) or by appointment.