Mysterious door. Help!!! (Lords of the Fallen)

The place is called "Northern outskirts", the door is to the right of the hero, behind it you can see the corridor. How to get there? Already trampled the whole district, help !!!
Spoilerhttp: //i80.fastpic.ru/big/2016/0520/88/b6871463cf50a953f75cd96ab9775e88.jpg